The applicability of this hyper-MD method was validated for the case of single vacancy
diffusion in bulk aluminum and on its surface [6,7].
However, this technique depends on the accuracy and efficiency of
the construction of a bias potential by diagonalizing a Hessian matrix.
Recently, Chen and Horing [8] introduced a new formula for
the acceleration weight factor in the hyper-MD method proposed
by Voter, and demonstrated that this new form can correctly
provide an exact simulation of the true dynamics of a system not
only where the transition state theory (TST) is applicable but also
where the TST is not applicable.
On the other hand, Hamelberget al