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<title>pair_style table command &mdash; LAMMPS documentation</title>
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<div class="lammps_version">Version: <b>19 Nov 2024</b></div>
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<li class="toctree-l1"><a class="reference internal" href="Intro.html">1. Introduction</a></li>
<li class="toctree-l1"><a class="reference internal" href="Install.html">2. Install LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Build.html">3. Build LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Run_head.html">4. Run LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Commands.html">5. Commands</a></li>
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<p class="caption" role="heading"><span class="caption-text">Programmer Guide</span></p>
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<li class="toctree-l1"><a class="reference internal" href="Library.html">1. LAMMPS Library Interfaces</a></li>
<li class="toctree-l1"><a class="reference internal" href="Python_head.html">2. Use Python with LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Modify.html">3. Modifying &amp; extending LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Developer.html">4. Information for Developers</a></li>
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<p class="caption" role="heading"><span class="caption-text">Command Reference</span></p>
<ul class="current">
<li class="toctree-l1"><a class="reference internal" href="commands_list.html">Commands</a></li>
<li class="toctree-l1"><a class="reference internal" href="fixes.html">Fix Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="computes.html">Compute Styles</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="pairs.html">Pair Styles</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="pair_adp.html">pair_style adp command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_agni.html">pair_style agni command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_aip_water_2dm.html">pair_style aip/water/2dm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_airebo.html">pair_style airebo command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_airebo.html#pair-style-airebo-morse-command">pair_style airebo/morse command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_airebo.html#pair-style-rebo-command">pair_style rebo command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_amoeba.html">pair_style amoeba command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_amoeba.html#pair-style-hippo-command">pair_style hippo command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_atm.html">pair_style atm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_awpmd.html">pair_style awpmd/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_beck.html">pair_style beck command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_body_nparticle.html">pair_style body/nparticle command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_body_rounded_polygon.html">pair_style body/rounded/polygon command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_body_rounded_polyhedron.html">pair_style body/rounded/polyhedron command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_bop.html">pair_style bop command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_born.html">pair_style born command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_born.html#pair-style-born-coul-long-command">pair_style born/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_born.html#pair-style-born-coul-msm-command">pair_style born/coul/msm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_born.html#pair-style-born-coul-wolf-command">pair_style born/coul/wolf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_born.html#pair-style-born-coul-dsf-command">pair_style born/coul/dsf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_born_gauss.html">pair_style born/gauss command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_bpm_spring.html">pair_style bpm/spring command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_brownian.html">pair_style brownian command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_brownian.html#pair-style-brownian-poly-command">pair_style brownian/poly command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_buck.html">pair_style buck command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_buck.html#pair-style-buck-coul-cut-command">pair_style buck/coul/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_buck.html#pair-style-buck-coul-long-command">pair_style buck/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_buck.html#pair-style-buck-coul-msm-command">pair_style buck/coul/msm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_buck6d_coul_gauss.html">pair_style buck6d/coul/gauss/dsf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_buck6d_coul_gauss.html#pair-style-buck6d-coul-gauss-long-command">pair_style buck6d/coul/gauss/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_buck_long.html">pair_style buck/long/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_charmm.html">pair_style lj/charmm/coul/charmm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_charmm.html#pair-style-lj-charmm-coul-charmm-implicit-command">pair_style lj/charmm/coul/charmm/implicit command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_charmm.html#pair-style-lj-charmm-coul-long-command">pair_style lj/charmm/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_charmm.html#pair-style-lj-charmm-coul-msm-command">pair_style lj/charmm/coul/msm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_charmm.html#pair-style-lj-charmmfsw-coul-charmmfsh-command">pair_style lj/charmmfsw/coul/charmmfsh command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_charmm.html#pair-style-lj-charmmfsw-coul-long-command">pair_style lj/charmmfsw/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_class2.html">pair_style lj/class2 command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_class2.html#pair-style-lj-class2-coul-cut-command">pair_style lj/class2/coul/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_class2.html#pair-style-lj-class2-coul-long-command">pair_style lj/class2/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_colloid.html">pair_style colloid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_comb.html">pair_style comb command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_comb.html#pair-style-comb3-command">pair_style comb3 command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cosine_squared.html">pair_style cosine/squared command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html">pair_style coul/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-cut-global-command">pair_style coul/cut/global command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-ctip-command">pair_style coul/ctip command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-debye-command">pair_style coul/debye command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-dsf-command">pair_style coul/dsf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-exclude-command">pair_style coul/exclude command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-long-command">pair_style coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-msm-command">pair_style coul/msm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-streitz-command">pair_style coul/streitz command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-coul-wolf-command">pair_style coul/wolf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-tip4p-cut-command">pair_style tip4p/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul.html#pair-style-tip4p-long-command">pair_style tip4p/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul_diel.html">pair_style coul/diel command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul_shield.html">pair_style coul/shield command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul_slater.html">pair_style coul/slater command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul_slater.html#pair-style-coul-slater-cut-command">pair_style coul/slater/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul_slater.html#pair-style-coul-slater-long-command">pair_style coul/slater/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_coul_tt.html">pair_style coul/tt command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cs.html">pair_style born/coul/dsf/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cs.html#pair-style-born-coul-long-cs-command">pair_style born/coul/long/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cs.html#pair-style-born-coul-wolf-cs-command">pair_style born/coul/wolf/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cs.html#pair-style-buck-coul-long-cs-command">pair_style buck/coul/long/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cs.html#pair-style-coul-long-cs-command">pair_style coul/long/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cs.html#pair-style-coul-wolf-cs-command">pair_style coul/wolf/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cs.html#pair-style-lj-cut-coul-long-cs-command">pair_style lj/cut/coul/long/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_cs.html#pair-style-lj-class2-coul-long-cs-command">pair_style lj/class2/coul/long/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dielectric.html">pair_style coul/cut/dielectric command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dielectric.html#pair-style-coul-long-dielectric-command">pair_style coul/long/dielectric command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dielectric.html#pair-style-lj-cut-coul-cut-dielectric-command">pair_style lj/cut/coul/cut/dielectric command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dielectric.html#pair-style-lj-cut-coul-debye-dielectric-command">pair_style lj/cut/coul/debye/dielectric command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dielectric.html#pair-style-lj-cut-coul-long-dielectric-command">pair_style lj/cut/coul/long/dielectric command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dielectric.html#pair-style-lj-cut-coul-msm-dielectric-command">pair_style lj/cut/coul/msm/dielectric command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dielectric.html#pair-style-lj-long-coul-long-dielectric-command">pair_style lj/long/coul/long/dielectric command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dipole.html">pair_style lj/cut/dipole/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dipole.html#pair-style-lj-sf-dipole-sf-command">pair_style lj/sf/dipole/sf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dipole.html#pair-style-lj-cut-dipole-long-command">pair_style lj/cut/dipole/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dipole.html#pair-style-lj-long-dipole-long-command">pair_style lj/long/dipole/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dpd.html">pair_style dpd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dpd.html#pair-style-dpd-tstat-command">pair_style dpd/tstat command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dpd_coul_slater_long.html">pair_style dpd/coul/slater/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dpd_ext.html">pair_style dpd/ext command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dpd_ext.html#pair-style-dpd-ext-tstat-command">pair_style dpd/ext/tstat command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dpd_fdt.html">pair_style dpd/fdt command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dpd_fdt.html#pair-style-dpd-fdt-energy-command">pair_style dpd/fdt/energy command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_drip.html">pair_style drip command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_dsmc.html">pair_style dsmc command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_e3b.html">pair_style e3b command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_eam.html">pair_style eam command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_eam.html#pair-style-eam-alloy-command">pair_style eam/alloy command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_eam.html#pair-style-eam-cd-command">pair_style eam/cd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_eam.html#pair-style-eam-cd-old-command">pair_style eam/cd/old command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_eam.html#pair-style-eam-fs-command">pair_style eam/fs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_eam.html#pair-style-eam-he-command">pair_style eam/he command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_edip.html">pair_style edip command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_edip.html#pair-style-edip-multi-command">pair_style edip/multi command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_eff.html">pair_style eff/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_eim.html">pair_style eim command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_exp6_rx.html">pair_style exp6/rx command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_extep.html">pair_style extep command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html">pair_style lj/cut/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-lj-cut-coul-cut-soft-command">pair_style lj/cut/coul/cut/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-lj-cut-coul-long-soft-command">pair_style lj/cut/coul/long/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-lj-cut-tip4p-long-soft-command">pair_style lj/cut/tip4p/long/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-lj-charmm-coul-long-soft-command">pair_style lj/charmm/coul/long/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-lj-class2-soft-command">pair_style lj/class2/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-lj-class2-coul-cut-soft-command">pair_style lj/class2/coul/cut/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-lj-class2-coul-long-soft-command">pair_style lj/class2/coul/long/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-coul-cut-soft-command">pair_style coul/cut/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-coul-long-soft-command">pair_style coul/long/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-tip4p-long-soft-command">pair_style tip4p/long/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_fep_soft.html#pair-style-morse-soft-command">pair_style morse/soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gauss.html">pair_style gauss command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gauss.html#pair-style-gauss-cut-command">pair_style gauss/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gayberne.html">pair_style gayberne command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gran.html">pair_style gran/hooke command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gran.html#pair-style-gran-hooke-history-command">pair_style gran/hooke/history command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gran.html#pair-style-gran-hertz-history-command">pair_style gran/hertz/history command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_granular.html">pair_style granular command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gromacs.html">pair_style lj/gromacs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gromacs.html#pair-style-lj-gromacs-coul-gromacs-command">pair_style lj/gromacs/coul/gromacs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gw.html">pair_style gw command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_gw.html#pair-style-gw-zbl-command">pair_style gw/zbl command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_harmonic_cut.html">pair_style harmonic/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_hbond_dreiding.html">pair_style hbond/dreiding/lj command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_hbond_dreiding.html#pair-style-hbond-dreiding-morse-command">pair_style hbond/dreiding/morse command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_hdnnp.html">pair_style hdnnp command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_hybrid.html">pair_style hybrid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_hybrid.html#pair-style-hybrid-molecular-command">pair_style hybrid/molecular command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_hybrid.html#pair-style-hybrid-overlay-command">pair_style hybrid/overlay command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_hybrid.html#pair-style-hybrid-scaled-command">pair_style hybrid/scaled command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_ilp_graphene_hbn.html">pair_style ilp/graphene/hbn command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_ilp_tmd.html">pair_style ilp/tmd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_kim.html">pair_style kim command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_kolmogorov_crespi_full.html">pair_style kolmogorov/crespi/full command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_kolmogorov_crespi_z.html">pair_style kolmogorov/crespi/z command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lcbop.html">pair_style lcbop command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lebedeva_z.html">pair_style lebedeva/z command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lepton.html">pair_style lepton command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_line_lj.html">pair_style line/lj command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_list.html">pair_style list command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj.html">pair_style lj/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj96.html">pair_style lj96/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cubic.html">pair_style lj/cubic command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_coul.html">pair_style lj/cut/coul/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_coul.html#pair-style-lj-cut-coul-debye-command">pair_style lj/cut/coul/debye command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_coul.html#pair-style-lj-cut-coul-dsf-command">pair_style lj/cut/coul/dsf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_coul.html#pair-style-lj-cut-coul-long-command">pair_style lj/cut/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_coul.html#pair-style-lj-cut-coul-msm-command">pair_style lj/cut/coul/msm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_coul.html#pair-style-lj-cut-coul-wolf-command">pair_style lj/cut/coul/wolf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_sphere.html">pair_style lj/cut/sphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_tip4p.html">pair_style lj/cut/tip4p/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_cut_tip4p.html#pair-style-lj-cut-tip4p-long-command">pair_style lj/cut/tip4p/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_expand.html">pair_style lj/expand command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_expand.html#pair-style-lj-expand-coul-long-command">pair_style lj/expand/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_expand_sphere.html">pair_style lj/expand/sphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_long.html">pair_style lj/long/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_long.html#pair-style-lj-long-tip4p-long-command">pair_style lj/long/tip4p/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_relres.html">pair_style lj/relres command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_smooth.html">pair_style lj/smooth command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_smooth_linear.html">pair_style lj/smooth/linear command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_switch3_coulgauss_long.html">pair_style lj/switch3/coulgauss/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lj_switch3_coulgauss_long.html#pair-style-mm3-switch3-coulgauss-long-command">pair_style mm3/switch3/coulgauss/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_local_density.html">pair_style local/density command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lubricate.html">pair_style lubricate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lubricate.html#pair-style-lubricate-poly-command">pair_style lubricate/poly command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lubricateU.html">pair_style lubricateU command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_lubricateU.html#pair-style-lubricateu-poly-command">pair_style lubricateU/poly command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mdf.html">pair_style lj/mdf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mdf.html#pair-style-buck-mdf-command">pair_style buck/mdf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mdf.html#pair-style-lennard-mdf-command">pair_style lennard/mdf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_meam.html">pair_style meam command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_meam.html#pair-style-meam-ms-command">pair_style meam/ms command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_meam_spline.html">pair_style meam/spline command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_meam_sw_spline.html">pair_style meam/sw/spline command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mesocnt.html">pair_style mesocnt command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mesocnt.html#pair-style-mesocnt-viscous-command">pair_style mesocnt/viscous command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mesodpd.html">pair_style edpd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mesodpd.html#pair-style-mdpd-command">pair_style mdpd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mesodpd.html#pair-style-mdpd-rhosum-command">pair_style mdpd/rhosum command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mesodpd.html#pair-style-tdpd-command">pair_style tdpd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mgpt.html">pair_style mgpt command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mie.html">pair_style mie/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_mliap.html">pair_style mliap command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_momb.html">pair_style momb command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_morse.html">pair_style morse command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_morse.html#pair-style-morse-smooth-linear-command">pair_style morse/smooth/linear command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_multi_lucy.html">pair_style multi/lucy command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_multi_lucy_rx.html">pair_style multi/lucy/rx command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_nb3b.html">pair_style nb3b/harmonic command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_nb3b.html#pair-style-nb3b-screened-command">pair_style nb3b/screened command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_nm.html">pair_style nm/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_nm.html#pair-style-nm-cut-split-command">pair_style nm/cut/split command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_nm.html#pair-style-nm-cut-coul-cut-command">pair_style nm/cut/coul/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_nm.html#pair-style-nm-cut-coul-long-command">pair_style nm/cut/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_none.html">pair_style none command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna.html">pair_style oxdna/excv command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna.html#pair-style-oxdna-stk-command">pair_style oxdna/stk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna.html#pair-style-oxdna-hbond-command">pair_style oxdna/hbond command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna.html#pair-style-oxdna-xstk-command">pair_style oxdna/xstk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna.html#pair-style-oxdna-coaxstk-command">pair_style oxdna/coaxstk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna2.html">pair_style oxdna2/excv command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna2.html#pair-style-oxdna2-stk-command">pair_style oxdna2/stk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna2.html#pair-style-oxdna2-hbond-command">pair_style oxdna2/hbond command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna2.html#pair-style-oxdna2-xstk-command">pair_style oxdna2/xstk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna2.html#pair-style-oxdna2-coaxstk-command">pair_style oxdna2/coaxstk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxdna2.html#pair-style-oxdna2-dh-command">pair_style oxdna2/dh command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxrna2.html">pair_style oxrna2/excv command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxrna2.html#pair-style-oxrna2-stk-command">pair_style oxrna2/stk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxrna2.html#pair-style-oxrna2-hbond-command">pair_style oxrna2/hbond command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxrna2.html#pair-style-oxrna2-xstk-command">pair_style oxrna2/xstk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxrna2.html#pair-style-oxrna2-coaxstk-command">pair_style oxrna2/coaxstk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_oxrna2.html#pair-style-oxrna2-dh-command">pair_style oxrna2/dh command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_pace.html">pair_style pace command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_pace.html#pair-style-pace-extrapolation-command">pair_style pace/extrapolation command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_pedone.html">pair_style pedone command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_peri.html">pair_style peri/pmb command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_peri.html#pair-style-peri-lps-command">pair_style peri/lps command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_peri.html#pair-style-peri-ves-command">pair_style peri/ves command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_peri.html#pair-style-peri-eps-command">pair_style peri/eps command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_pod.html">pair_style pod command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_polymorphic.html">pair_style polymorphic command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_python.html">pair_style python command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_quip.html">pair_style quip command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_rann.html">pair_style rann command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_reaxff.html">pair_style reaxff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_rebomos.html">pair_style rebomos command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_resquared.html">pair_style resquared command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_rheo.html">pair_style rheo command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_rheo_solid.html">pair_style rheo/solid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_saip_metal.html">pair_style saip/metal command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sdpd_taitwater_isothermal.html">pair_style sdpd/taitwater/isothermal command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_smatb.html">pair_style smatb command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_smatb.html#pair-style-smatb-single-command">pair_style smatb/single command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_smd_hertz.html">pair_style smd/hertz command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_smd_tlsph.html">pair_style smd/tlsph command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_smd_triangulated_surface.html">pair_style smd/tri_surface command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_smd_ulsph.html">pair_style smd/ulsph command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_smtbq.html">pair_style smtbq command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_snap.html">pair_style snap command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_soft.html">pair_style soft command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sph_heatconduction.html">pair_style sph/heatconduction command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sph_idealgas.html">pair_style sph/idealgas command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sph_lj.html">pair_style sph/lj command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sph_rhosum.html">pair_style sph/rhosum command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sph_taitwater.html">pair_style sph/taitwater command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sph_taitwater_morris.html">pair_style sph/taitwater/morris command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spica.html">pair_style lj/spica command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spica.html#pair-style-lj-spica-coul-long-command">pair_style lj/spica/coul/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spica.html#pair-style-lj-spica-coul-msm-command">pair_style lj/spica/coul/msm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spin_dipole.html">pair_style spin/dipole/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spin_dipole.html#pair-style-spin-dipole-long-command">pair_style spin/dipole/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spin_dmi.html">pair_style spin/dmi command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spin_exchange.html">pair_style spin/exchange command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spin_exchange.html#pair-style-spin-exchange-biquadratic-command">pair_style spin/exchange/biquadratic command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spin_magelec.html">pair_style spin/magelec command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_spin_neel.html">pair_style spin/neel command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_srp.html">pair_style srp command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_srp.html#pair-style-srp-react-command">pair_style srp/react command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sw.html">pair_style sw command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sw.html#pair-style-sw-mod-command">pair_style sw/mod command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_sw_angle_table.html">pair_style sw/angle/table command</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">pair_style table command</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#syntax">Syntax</a></li>
<li class="toctree-l3"><a class="reference internal" href="#examples">Examples</a></li>
<li class="toctree-l3"><a class="reference internal" href="#description">Description</a></li>
<li class="toctree-l3"><a class="reference internal" href="#mixing-shift-table-tail-correction-restart-rrespa-info">Mixing, shift, table, tail correction, restart, rRESPA info</a></li>
<li class="toctree-l3"><a class="reference internal" href="#restrictions">Restrictions</a></li>
<li class="toctree-l3"><a class="reference internal" href="#related-commands">Related commands</a></li>
<li class="toctree-l3"><a class="reference internal" href="#default">Default</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="pair_table_rx.html">pair_style table/rx command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_tersoff.html">pair_style tersoff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_tersoff.html#pair-style-tersoff-table-command">pair_style tersoff/table command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_tersoff_mod.html">pair_style tersoff/mod command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_tersoff_mod.html#pair-style-tersoff-mod-c-command">pair_style tersoff/mod/c command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_tersoff_zbl.html">pair_style tersoff/zbl command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_thole.html">pair_style thole command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_thole.html#pair-style-lj-cut-thole-long-command">pair_style lj/cut/thole/long command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_threebody_table.html">pair_style threebody/table command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_tracker.html">pair_style tracker command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_tri_lj.html">pair_style tri/lj command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_uf3.html">pair_style uf3 command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_ufm.html">pair_style ufm command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_vashishta.html">pair_style vashishta command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_vashishta.html#pair-style-vashishta-table-command">pair_style vashishta/table command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_wf_cut.html">pair_style wf/cut command</a></li>
<li class="toctree-l2"><a class="reference internal" href="pair_ylz.html">pair_style ylz command</a></li>
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<p><span class="math notranslate nohighlight">\(\renewcommand{\AA}{\text{Å}}\)</span></p>
<section id="pair-style-table-command">
<span id="index-3"></span><span id="index-2"></span><span id="index-1"></span><span id="index-0"></span><h1>pair_style table command<a class="headerlink" href="#pair-style-table-command" title="Link to this heading"></a></h1>
<p>Accelerator Variants: <em>table/gpu</em>, <em>table/kk</em>, <em>table/omp</em></p>
<section id="syntax">
<h2>Syntax<a class="headerlink" href="#syntax" title="Link to this heading"></a></h2>
<div class="highlight-LAMMPS notranslate"><div class="highlight"><pre><span></span><span class="k">pair_style</span><span class="w"> </span><span class="n">table</span><span class="w"> </span><span class="n">style</span><span class="w"> </span><span class="n">N</span><span class="w"> </span><span class="n">keyword</span><span class="w"> </span><span class="n">...</span>
</pre></div>
</div>
<ul class="simple">
<li><p>style = <em>lookup</em> or <em>linear</em> or <em>spline</em> or <em>bitmap</em> = method of interpolation</p></li>
<li><p>N = use N values in <em>lookup</em>, <em>linear</em>, <em>spline</em> tables</p></li>
<li><p>N = use 2^N values in <em>bitmap</em> tables</p></li>
<li><p>zero or more keywords may be appended</p></li>
<li><p>keyword = <em>ewald</em> or <em>pppm</em> or <em>msm</em> or <em>dispersion</em> or <em>tip4p</em></p></li>
</ul>
</section>
<section id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Link to this heading"></a></h2>
<div class="highlight-LAMMPS notranslate"><div class="highlight"><pre><span></span><span class="k">pair_style</span><span class="w"> </span><span class="n">table</span><span class="w"> </span><span class="n">linear</span><span class="w"> </span><span class="m">1000</span>
<span class="k">pair_style</span><span class="w"> </span><span class="n">table</span><span class="w"> </span><span class="n">linear</span><span class="w"> </span><span class="m">1000</span><span class="w"> </span><span class="n">pppm</span>
<span class="k">pair_style</span><span class="w"> </span><span class="n">table</span><span class="w"> </span><span class="n">bitmap</span><span class="w"> </span><span class="m">12</span>
<span class="k">pair_coeff</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="m">3</span><span class="w"> </span><span class="n">morse.table</span><span class="w"> </span><span class="n">ENTRY1</span>
<span class="k">pair_coeff</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="m">3</span><span class="w"> </span><span class="n">morse.table</span><span class="w"> </span><span class="n">ENTRY1</span><span class="w"> </span><span class="m">7.0</span>
</pre></div>
</div>
</section>
<section id="description">
<h2>Description<a class="headerlink" href="#description" title="Link to this heading"></a></h2>
<p>Style <em>table</em> creates interpolation tables from potential energy and
force values listed in a file(s) as a function of distance. When
performing dynamics or minimization, the interpolation tables are used
to evaluate energy and forces for pairwise interactions between
particles, similar to how analytic formulas are used for other pair
styles.</p>
<p>The interpolation tables are created as a pre-computation by fitting
cubic splines to the file values and interpolating energy and force
values at each of <em>N</em> distances. During a simulation, the tables are
used to interpolate energy and force values as needed for each pair of
particles separated by a distance <em>R</em>. The interpolation is done in
one of 4 styles: <em>lookup</em>, <em>linear</em>, <em>spline</em>, or <em>bitmap</em>.</p>
<p>For the <em>lookup</em> style, the distance <em>R</em> is used to find the nearest
table entry, which is the energy or force.</p>
<p>For the <em>linear</em> style, the distance <em>R</em> is used to find the 2
surrounding table values from which an energy or force is computed by
linear interpolation.</p>
<p>For the <em>spline</em> style, cubic spline coefficients are computed and
stored for each of the <em>N</em> values in the table, one set of splines for
energy, another for force. Note that these splines are different than
the ones used to pre-compute the <em>N</em> values. Those splines were fit
to the <em>Nfile</em> values in the tabulated file, where often <em>Nfile</em> &lt;
<em>N</em>. The distance <em>R</em> is used to find the appropriate set of spline
coefficients which are used to evaluate a cubic polynomial which
computes the energy or force.</p>
<p>For the <em>bitmap</em> style, the specified <em>N</em> is used to create
interpolation tables that are 2^N in length. The distance <em>R</em> is used
to index into the table via a fast bit-mapping technique due to
<a class="reference internal" href="#wolff2"><span class="std std-ref">(Wolff)</span></a>, and a linear interpolation is performed between
adjacent table values.</p>
<p>The following coefficients must be defined for each pair of atoms
types via the <a class="reference internal" href="pair_coeff.html"><span class="doc">pair_coeff</span></a> command as in the examples
above.</p>
<ul class="simple">
<li><p>filename</p></li>
<li><p>keyword</p></li>
<li><p>cutoff (distance units)</p></li>
</ul>
<p>The filename specifies a file containing tabulated energy and force
values. The keyword specifies a section of the file. The cutoff is
an optional coefficient. If not specified, the outer cutoff in the
table itself (see below) will be used to build an interpolation table
that extend to the largest tabulated distance. If specified, only
file values up to the cutoff are used to create the interpolation
table. The format of this file is described below.</p>
<p>If your tabulated potential(s) are designed to be used as the
short-range part of one of the long-range solvers specified by the
<a class="reference internal" href="kspace_style.html"><span class="doc">kspace_style</span></a> command, then you must use one or
more of the optional keywords listed above for the pair_style command.
These are <em>ewald</em> or <em>pppm</em> or <em>msm</em> or <em>dispersion</em> or <em>tip4p</em>. This
is so LAMMPS can ensure the short-range potential and long-range
solver are compatible with each other, as it does for other
short-range pair styles, such as <a class="reference internal" href="pair_lj_cut_coul.html"><span class="doc">pair_style lj/cut/coul/long</span></a>. Note that it is up to you to ensure
the tabulated values for each pair of atom types has the correct
functional form to be compatible with the matching long-range solver.</p>
<hr class="docutils" />
<p>Here are some guidelines for using the pair_style table command to
best effect:</p>
<ul class="simple">
<li><p>Vary the number of table points; you may need to use more than you think
to get good resolution.</p></li>
<li><p>Always use the <a class="reference internal" href="pair_write.html"><span class="doc">pair_write</span></a> command to produce a plot
of what the final interpolated potential looks like. This can show up
interpolation “features” you may not like.</p></li>
<li><p>Start with the linear style; its the style least likely to have problems.</p></li>
<li><p>Use <em>N</em> in the pair_style command equal to the “N” in the tabulation
file, and use the “RSQ” or “BITMAP” parameter, so additional interpolation
is not needed. See discussion below.</p></li>
<li><p>Make sure that your tabulated forces and tabulated energies are
consistent (dE/dr = -F) over the entire range of r values. LAMMPS
will warn if this is not the case.</p></li>
<li><p>Use as large an inner cutoff as possible. This avoids fitting splines
to very steep parts of the potential.</p></li>
</ul>
<hr class="docutils" />
<p>Suitable tables in the correct format for use with these pair styles can
be created by LAMMPS itself using the <a class="reference internal" href="pair_write.html"><span class="doc">pair_write</span></a>
command. In combination with the pair styles <a class="reference internal" href="pair_python.html"><span class="doc">python</span></a>,
<a class="reference internal" href="pair_lepton.html"><span class="doc">lepton, or lepton/coul</span></a> this can be a powerful
mechanism to implement and test tables for use with LAMMPS. Another
option to generate tables is the Python code in the <code class="docutils literal notranslate"><span class="pre">tools/tabulate</span></code>
folder of the LAMMPS source code distribution.</p>
<p>The format of a tabulated file has an (optional) header followed by a
series of one or more sections, defined as follows (without the
parenthesized comments). The header must start with a <cite>#</cite> character
and the DATE: and UNITS: tags will be parsed and used:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span># DATE: 2020-06-10 UNITS: real CONTRIBUTOR: ... (header line)
# Morse potential for Fe (one or more comment or blank lines)
MORSE_FE (keyword is first text on line)
N 500 R 1.0 10.0 (N, R, RSQ, BITMAP, FPRIME parameters)
(blank)
1 1.0 25.5 102.34 (index, r, energy, force)
2 1.02 23.4 98.5
...
500 10.0 0.001 0.003
</pre></div>
</div>
<p>A section begins with a non-blank line whose first character is not a
“#”; blank lines or lines starting with “#” can be used as comments
between sections. The first line begins with a keyword which
identifies the section. The line can contain additional text, but the
initial text must match the argument specified in the pair_coeff
command. The next line lists (in any order) one or more parameters
for the table. Each parameter is a keyword followed by one or more
numeric values.</p>
<p>The parameter “N” is required and its value is the number of table
entries that follow. Note that this may be different than the <em>N</em>
specified in the <a class="reference internal" href="pair_style.html"><span class="doc">pair_style table</span></a> command. Let
Ntable = <em>N</em> in the pair_style command, and Nfile = “N” in the
tabulated file. What LAMMPS does is a preliminary interpolation by
creating splines using the Nfile tabulated values as nodal points. It
uses these to interpolate energy and force values at Ntable different
points. The resulting tables of length Ntable are then used as
described above, when computing energy and force for individual pair
distances. This means that if you want the interpolation tables of
length Ntable to match exactly what is in the tabulated file (with
effectively no preliminary interpolation), you should set Ntable =
Nfile, and use the “RSQ” or “BITMAP” parameter. This is because the
internal table abscissa is always RSQ (separation distance squared),
for efficient lookup.</p>
<p>All other parameters are optional. If “R” or “RSQ” or “BITMAP” does
not appear, then the distances in each line of the table are used
as-is to perform spline interpolation. In this case, the table values
can be spaced in <em>r</em> uniformly or however you wish to position table
values in regions of large gradients.</p>
<p>If used, the parameters “R” or “RSQ” are followed by 2 values <em>rlo</em>
and <em>rhi</em>. If specified, the distance associated with each energy and
force value is computed from these 2 values (at high accuracy), rather
than using the (low-accuracy) value listed in each line of the table.
The distance values in the table file are ignored in this case.
For “R”, distances uniformly spaced between <em>rlo</em> and <em>rhi</em> are
computed; for “RSQ”, squared distances uniformly spaced between
<em>rlo*rlo</em> and <em>rhi*rhi</em> are computed.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>If you use “R” or “RSQ”, the tabulated distance values in the
file are effectively ignored, and replaced by new values as described
in the previous paragraph. If the distance value in the table is not
very close to the new value (i.e. round-off difference), then you will
be assigning energy/force values to a different distance, which is
probably not what you want. LAMMPS will warn if this is occurring.</p>
</div>
<p>If used, the parameter “BITMAP” is also followed by 2 values <em>rlo</em> and
<em>rhi</em>. These values, along with the “N” value determine the ordering
of the N lines that follow and what distance is associated with each.
This ordering is complex, so it is not documented here, since this
file is typically produced by the <a class="reference internal" href="pair_write.html"><span class="doc">pair_write</span></a> command
with its <em>bitmap</em> option. When the table is in BITMAP format, the “N”
parameter in the file must be equal to 2^M where M is the value
specified in the pair_style command. Also, a cutoff parameter cannot
be used as an optional third argument in the pair_coeff command; the
entire table extent as specified in the file must be used.</p>
<p>If used, the parameter “FPRIME” is followed by 2 values <em>fplo</em> and
<em>fphi</em> which are the derivative of the force at the innermost and
outermost distances listed in the table. These values are needed by
the spline construction routines. If not specified by the “FPRIME”
parameter, they are estimated (less accurately) by the first 2 and
last 2 force values in the table. This parameter is not used by
BITMAP tables.</p>
<p>Following a blank line, the next N lines list the tabulated values.
On each line, the first value is the index from 1 to N, the second value is
r (in distance units), the third value is the energy (in energy units),
and the fourth is the force (in force units). The r values must increase
from one line to the next (unless the BITMAP parameter is specified).</p>
<p>Note that one file can contain many sections, each with a tabulated
potential. LAMMPS reads the file section by section until it finds
one that matches the specified keyword.</p>
<hr class="docutils" />
<p>Styles with a <em>gpu</em>, <em>intel</em>, <em>kk</em>, <em>omp</em>, or <em>opt</em> suffix are
functionally the same as the corresponding style without the suffix.
They have been optimized to run faster, depending on your available
hardware, as discussed on the <a class="reference internal" href="Speed_packages.html"><span class="doc">Accelerator packages</span></a>
page. The accelerated styles take the same arguments and should
produce the same results, except for round-off and precision issues.</p>
<p>These accelerated styles are part of the GPU, INTEL, KOKKOS,
OPENMP, and OPT packages, respectively. They are only enabled if
LAMMPS was built with those packages. See the <a class="reference internal" href="Build_package.html"><span class="doc">Build package</span></a> page for more info.</p>
<p>You can specify the accelerated styles explicitly in your input script
by including their suffix, or you can use the <a class="reference internal" href="Run_options.html"><span class="doc">-suffix command-line switch</span></a> when you invoke LAMMPS, or you can use the
<a class="reference internal" href="suffix.html"><span class="doc">suffix</span></a> command in your input script.</p>
<p>See the <a class="reference internal" href="Speed_packages.html"><span class="doc">Accelerator packages</span></a> page for more
instructions on how to use the accelerated styles effectively.</p>
</section>
<hr class="docutils" />
<section id="mixing-shift-table-tail-correction-restart-rrespa-info">
<h2>Mixing, shift, table, tail correction, restart, rRESPA info<a class="headerlink" href="#mixing-shift-table-tail-correction-restart-rrespa-info" title="Link to this heading"></a></h2>
<p>This pair style does not support mixing. Thus, coefficients for all
I,J pairs must be specified explicitly.</p>
<p>The <a class="reference internal" href="pair_modify.html"><span class="doc">pair_modify</span></a> shift, table, and tail options are
not relevant for this pair style.</p>
<p>This pair style writes the settings for the “pair_style table” command
to <a class="reference internal" href="restart.html"><span class="doc">binary restart files</span></a>, so a pair_style command does
not need to specified in an input script that reads a restart file.
However, the coefficient information is not stored in the restart
file, since it is tabulated in the potential files. Thus, pair_coeff
commands do need to be specified in the restart input script.</p>
<p>This pair style can only be used via the <em>pair</em> keyword of the
<a class="reference internal" href="run_style.html"><span class="doc">run_style respa</span></a> command. It does not support the
<em>inner</em>, <em>middle</em>, <em>outer</em> keywords.</p>
</section>
<hr class="docutils" />
<section id="restrictions">
<h2>Restrictions<a class="headerlink" href="#restrictions" title="Link to this heading"></a></h2>
<p>none</p>
</section>
<section id="related-commands">
<h2>Related commands<a class="headerlink" href="#related-commands" title="Link to this heading"></a></h2>
<p><a class="reference internal" href="pair_coeff.html"><span class="doc">pair_coeff</span></a>, <a class="reference internal" href="pair_write.html"><span class="doc">pair_write</span></a></p>
</section>
<section id="default">
<h2>Default<a class="headerlink" href="#default" title="Link to this heading"></a></h2>
<p>none</p>
<hr class="docutils" />
<p id="wolff2"><strong>(Wolff)</strong> Wolff and Rudd, Comp Phys Comm, 120, 200-32 (1999).</p>
</section>
</section>
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