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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 current" > < a class = "current reference internal" href = "" > 13. Future and history< / a > < ul >
< li class = "toctree-l2" > < a class = "reference internal" href = "#coming-attractions" > 13.1. Coming attractions< / a > < / li >
< li class = "toctree-l2" > < a class = "reference internal" href = "#past-versions" > 13.2. Past versions< / a > < / li >
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< h1 > 13. Future and history< a class = "headerlink" href = "#future-and-history" title = "Permalink to this headline" > ¶< / a > < / h1 >
< p > This section lists features we plan to add to LAMMPS, features of
previous versions of LAMMPS, and features of other parallel molecular
dynamics codes our group has distributed.< / p >
< div class = "line-block" >
< div class = "line" > 13.1 < a class = "reference internal" href = "#hist-1" > < span > Coming attractions< / span > < / a > < / div >
< div class = "line" > 13.2 < a class = "reference internal" href = "#hist-2" > < span > Past versions< / span > < / a > < / div >
< div class = "line" > < br / > < / div >
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< span id = "hist-1" > < / span > < h2 > 13.1. Coming attractions< a class = "headerlink" href = "#coming-attractions" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > The < a class = "reference external" href = "http://lammps.sandia.gov/future.html" > Wish list link< / a > on the
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LAMMPS WWW page gives a list of features we are hoping to add to
LAMMPS in the future, including contact names of individuals you can
email if you are interested in contributing to the developement or
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would be a future user of that feature.< / p >
< p > You can also send < a class = "reference external" href = "http://lammps.sandia.gov/authors.html" > email to the developers< / a > if you want to add
your wish to the list.< / p >
< hr class = "docutils" / >
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< span id = "hist-2" > < / span > < h2 > 13.2. Past versions< a class = "headerlink" href = "#past-versions" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > LAMMPS development began in the mid 1990s under a cooperative research
& 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
to develop a large-scale parallel classical MD code; the coding effort
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was led by Steve Plimpton at Sandia.< / p >
< 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
management was converted to F90; a final F90 version was released as
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LAMMPS 2001.< / p >
< 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
those in LAMMPS 99 or 2001. It also includes features from older
parallel MD codes written at Sandia, namely ParaDyn, Warp, and
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GranFlow (see below).< / p >
< 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
a parallel framework similar to LAMMPS. Most notably, these have
included many-body potentials - Stillinger-Weber, Tersoff, ReaxFF -
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and the associated charge-equilibration routines needed for ReaxFF.< / p >
< 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 >
< 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
internally. A brief listing of their features is given here.< / p >
< p > LAMMPS 2001< / p >
< ul class = "simple" >
< li > F90 + MPI< / li >
< li > dynamic memory< / li >
< li > spatial-decomposition parallelism< / li >
< li > NVE, NVT, NPT, NPH, rRESPA integrators< / li >
< li > LJ and Coulombic pairwise force fields< / li >
< li > all-atom, united-atom, bead-spring polymer force fields< / li >
< li > CHARMM-compatible force fields< / li >
< li > class 2 force fields< / li >
< li > 3d/2d Ewald & PPPM< / li >
< li > various force and temperature constraints< / li >
< li > SHAKE< / li >
< li > Hessian-free truncated-Newton minimizer< / li >
< li > user-defined diagnostics< / li >
< / ul >
< p > LAMMPS 99< / p >
< ul class = "simple" >
< li > F77 + MPI< / li >
< li > static memory allocation< / li >
< li > spatial-decomposition parallelism< / li >
< li > most of the LAMMPS 2001 features with a few exceptions< / li >
< li > no 2d Ewald & PPPM< / li >
< li > molecular force fields are missing a few CHARMM terms< / li >
< li > no SHAKE< / li >
< / ul >
< p > Warp< / p >
< ul class = "simple" >
< li > F90 + MPI< / li >
< li > spatial-decomposition parallelism< / li >
< li > embedded atom method (EAM) metal potentials + LJ< / li >
< li > lattice and grain-boundary atom creation< / li >
< li > NVE, NVT integrators< / li >
< li > boundary conditions for applying shear stresses< / li >
< li > temperature controls for actively sheared systems< / li >
< li > per-atom energy and centro-symmetry computation and output< / li >
< / ul >
< p > ParaDyn< / p >
< ul class = "simple" >
< li > F77 + MPI< / li >
< li > atom- and force-decomposition parallelism< / li >
< li > embedded atom method (EAM) metal potentials< / li >
< li > lattice atom creation< / li >
< li > NVE, NVT, NPT integrators< / li >
< li > all serial DYNAMO features for controls and constraints< / li >
< / ul >
< p > GranFlow< / p >
< ul class = "simple" >
< li > F90 + MPI< / li >
< li > spatial-decomposition parallelism< / li >
< li > frictional granular potentials< / li >
< li > NVE integrator< / li >
< li > boundary conditions for granular flow and packing and walls< / li >
< li > particle insertion< / li >
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