Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2009-01-07
G. Bussi, T. Zykova-Timan and M. Parrinello, J. Chem. Phys. 130, 074101 (2009)
Physics
Condensed Matter
Statistical Mechanics
Accepted for publication on Journal of Chemical Physics
Scientific paper
10.1063/1.3073889
The authors present a new molecular dynamics algorithm for sampling the isothermal-isobaric ensemble. In this approach the velocities of all particles and volume degrees of freedom are rescaled by a properly chosen random factor. The technical aspects concerning the derivation of the integration scheme and the conservation laws are discussed in detail. The efficiency of the barostat is examined in Lennard-Jones solid and liquid near the triple point and compared with the deterministic Nos\'{e}-Hoover and the stochastic Langevin methods. In particular, the dependence of the sampling efficiency on the choice of the thermostat and barostat relaxation times is systematically analyzed.
Bussi Giovanni
Parrinello Michele
Zykova-Timan Tatyana
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