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NAMD Goes Quantum

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The 2.12 release of the molecular dynamics program NAMD provides major enhancements in performance, flexibility, and accuracy, complementing the greatly enhanced usability provided by the QwikMD GUI released in VMD 1.9.3. NVIDIA GPU-accelerated simulations with NAMD 2.12 are up to three times as fast as 2.11, particularly for implicit solvent simulations and single-node simulations of smaller systems. NAMD 2.12 is also optimized for the new Intel Xeon Phi KNL processors found in Argonne Theta, NERSC Cori, and TACC Stampede 2. NAMD 2.12 builds on the asynchronous multi-copy scripting capabilities introduced in NAMD 2.11 with the ability to modify and reload the molecular structure, enabling development of grand canonical and constant pH ensemble methods, as well as an optional Python interface for advanced on-the-fly analysis. Finally, NAMD 2.12 provides a complete, no-recompilation-needed interface for hybrid QM/MM with both the semi-empirical code MOPAC and the ab initio/DFT code ORCA. More on new features in the 2.12 release of NAMD can be found here. NAMD is available free-of-charge as source code, precompiled binaries, pre-installed at supercomputer centers, and now jointly with VMD as one-click interactive molecular modeling on the Amazon cloud.