Fang Ming and Tang Shao-Qiang 2009 Chinese Phys. Lett. 26 116201 doi:10.1088/0256-307X/26/11/116201
Fang Ming and Tang Shao-Qiang
Show affiliationsWe propose an efficient and robust way to design absorbing boundary conditions in atomistic computations. An optimal discrete boundary condition is obtained by minimizing a functional of a reflection coefficient integral over a range of wave numbers. The minimization is performed with respect to a set of wave numbers, at which transparent absorption is reached. Compared with the optimization with respect to the boundary condition coefficients suggested by E and Huang [Phys. Rev. Lett. 87 (2001) 133501], we reduce considerably the number of independent variables and the computing cost. We further demonstrate with numerical examples that both the optimization and the wave absorption are more robust in the proposed design.
Issue 11 (November 2009)
Received 26 May 2009
Fang Ming and Tang Shao-Qiang 2009 Chinese Phys. Lett. 26 116201
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