To overcome this limitation,
Voter provided a method for accelerating the molecular dynamics,
i.e., hyper-MD, which made it possible to simulate atomic dynamics on the scale of a microsecond
or longer.
Choudhary and Clancy applied this method to the
production of amorphous silicon, and obtained significant time of
boosts in the range of 4–12 for a small system without changing
the dynamics of the evolution. However, although numerical minimization
methods were proposed to efficiently obtain a numerical
approximation for a bias potential without the diagonalization
of the Hessian matrix, the computational time for each
hyper-MD step is still much longer than that of a conventional
MD step, and the cost for calculating the bias potential scales as
the square of the number of moving atoms is high, which prohibits
its application to large systems.
To overcome this limitation,Voter provided a method for accelerating the molecular dynamics, i.e., hyper-MD, which made it possible to simulate atomic dynamics on the scale of a microsecondor longer. Choudhary and Clancy applied this method to theproduction of amorphous silicon, and obtained significant time ofboosts in the range of 4–12 for a small system without changingthe dynamics of the evolution. However, although numerical minimizationmethods were proposed to efficiently obtain a numericalapproximation for a bias potential without the diagonalizationof the Hessian matrix, the computational time for eachhyper-MD step is still much longer than that of a conventionalMD step, and the cost for calculating the bias potential scales asthe square of the number of moving atoms is high, which prohibitsits application to large systems.
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