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<li class="toctree-l1"><a class="reference internal" href="Section_intro.html">1. Introduction</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_start.html">2. Getting Started</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_commands.html">3. Commands</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_packages.html">4. Packages</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_accelerate.html">5. Accelerating LAMMPS performance</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_howto.html">6. How-to discussions</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_example.html">7. Example problems</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_perf.html">8. Performance & scalability</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_tools.html">9. Additional tools</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_modify.html">10. Modifying & extending LAMMPS</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_python.html">11. Python interface to LAMMPS</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_errors.html">12. Errors</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">13. Future and history</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#coming-attractions">13.1. Coming attractions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#past-versions">13.2. Past versions</a></li>
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<div class="section" id="future-and-history">
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<h1>13. Future and history</h1>
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<p>This section lists features we plan to add to LAMMPS, features of
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previous versions of LAMMPS, and features of other parallel molecular
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dynamics codes our group has distributed.</p>
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<div class="line-block">
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<div class="line">13.1 <a class="reference internal" href="#hist-1"><span class="std std-ref">Coming attractions</span></a></div>
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<div class="line">13.2 <a class="reference internal" href="#hist-2"><span class="std std-ref">Past versions</span></a></div>
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<div class="line"><br /></div>
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</div>
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<div class="section" id="coming-attractions">
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<span id="hist-1"></span><h2>13.1. Coming attractions</h2>
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<p>As of summer 2016 we are using the <a class="reference external" href="https://github.com/lammps/lammps/issues">LAMMPS project issue tracker on GitHub</a> for keeping
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track of suggested, planned or pending new features. This includes
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discussions of how to best implement them, or why they would be
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useful. Especially if a planned or proposed feature is non-trivial
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to add, e.g. because it requires changes to some of the core
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classes of LAMMPS, people planning to contribute a new feature to
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LAMMS are encouraged to submit an issue about their planned
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implementation this way in order to receive feedback from the
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LAMMPS core developers. They will provide suggestions about
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the validity of the proposed approach and possible improvements,
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pitfalls or alternatives.</p>
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<p>Please see some of the closed issues for examples of how to
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suggest code enhancements, submit proposed changes, or report
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elated issues and how they are resoved.</p>
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<p>As an alternative to using GitHub, you may e-mail the
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<a class="reference external" href="http://lammps.sandia.gov/authors.html">core developers</a> or send
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an e-mail to the <a class="reference external" href="http://lammps.sandia.gov/mail.html">LAMMPS Mail list</a>
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if you want to have your suggestion added to the list.</p>
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<hr class="docutils" />
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</div>
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<div class="section" id="past-versions">
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<span id="hist-2"></span><h2>13.2. Past versions</h2>
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<p>LAMMPS development began in the mid 1990s under a cooperative research
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& development agreement (CRADA) between two DOE labs (Sandia and LLNL)
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and 3 companies (Cray, Bristol Myers Squibb, and Dupont). The goal was
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to develop a large-scale parallel classical MD code; the coding effort
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was led by Steve Plimpton at Sandia.</p>
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<p>After the CRADA ended, a final F77 version, LAMMPS 99, was
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released. As development of LAMMPS continued at Sandia, its memory
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management was converted to F90; a final F90 version was released as
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LAMMPS 2001.</p>
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<p>The current LAMMPS is a rewrite in C++ and was first publicly released
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as an open source code in 2004. It includes many new features beyond
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those in LAMMPS 99 or 2001. It also includes features from older
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parallel MD codes written at Sandia, namely ParaDyn, Warp, and
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GranFlow (see below).</p>
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<p>In late 2006 we began merging new capabilities into LAMMPS that were
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developed by Aidan Thompson at Sandia for his MD code GRASP, which has
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a parallel framework similar to LAMMPS. Most notably, these have
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included many-body potentials - Stillinger-Weber, Tersoff, ReaxFF -
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and the associated charge-equilibration routines needed for ReaxFF.</p>
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<p>The <a class="reference external" href="http://lammps.sandia.gov/history.html">History link</a> on the
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LAMMPS WWW page gives a timeline of features added to the
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C++ open-source version of LAMMPS over the last several years.</p>
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<p>These older codes are available for download from the <a class="reference external" href="http://lammps.sandia.gov">LAMMPS WWW site</a>, except for Warp & GranFlow which were primarily used
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internally. A brief listing of their features is given here.</p>
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<p>LAMMPS 2001</p>
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<ul class="simple">
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<li>F90 + MPI</li>
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<li>dynamic memory</li>
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<li>spatial-decomposition parallelism</li>
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<li>NVE, NVT, NPT, NPH, rRESPA integrators</li>
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<li>LJ and Coulombic pairwise force fields</li>
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<li>all-atom, united-atom, bead-spring polymer force fields</li>
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<li>CHARMM-compatible force fields</li>
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<li>class 2 force fields</li>
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<li>3d/2d Ewald & PPPM</li>
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<li>various force and temperature constraints</li>
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<li>SHAKE</li>
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<li>Hessian-free truncated-Newton minimizer</li>
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<li>user-defined diagnostics</li>
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</ul>
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<p>LAMMPS 99</p>
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<ul class="simple">
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<li>F77 + MPI</li>
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<li>static memory allocation</li>
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<li>spatial-decomposition parallelism</li>
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<li>most of the LAMMPS 2001 features with a few exceptions</li>
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<li>no 2d Ewald & PPPM</li>
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<li>molecular force fields are missing a few CHARMM terms</li>
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<li>no SHAKE</li>
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</ul>
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<p>Warp</p>
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<ul class="simple">
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<li>F90 + MPI</li>
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<li>spatial-decomposition parallelism</li>
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<li>embedded atom method (EAM) metal potentials + LJ</li>
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<li>lattice and grain-boundary atom creation</li>
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<li>NVE, NVT integrators</li>
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<li>boundary conditions for applying shear stresses</li>
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<li>temperature controls for actively sheared systems</li>
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<li>per-atom energy and centro-symmetry computation and output</li>
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</ul>
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<p>ParaDyn</p>
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<ul class="simple">
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<li>F77 + MPI</li>
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<li>atom- and force-decomposition parallelism</li>
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<li>embedded atom method (EAM) metal potentials</li>
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<li>lattice atom creation</li>
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<li>NVE, NVT, NPT integrators</li>
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<li>all serial DYNAMO features for controls and constraints</li>
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</ul>
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<p>GranFlow</p>
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<ul class="simple">
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<li>F90 + MPI</li>
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<li>spatial-decomposition parallelism</li>
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<li>frictional granular potentials</li>
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<li>NVE integrator</li>
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<li>boundary conditions for granular flow and packing and walls</li>
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<li>particle insertion</li>
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</ul>
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