**************** The 19th., Lab Seminar ****************************

Date: Thu, February 21, 2008  PM 1:30-

Place: No.616 Seminar room
             Graduate School of Information Science

Speaker: Masayoshi Takayanagi

Title:  Parallel replica method for dynamics of infrequent events
 Phys. Rev. B, 57, 13985 (1998)
 Arthur F. Voter

Abstract:
 Although molecular-dynamics simulations can be parallelized effectively 
to treat large systems (106?108 atoms), to date the power of parallel 
computers has not been harnessed to make analogous gains in time scale. 
I present a simple approach for infrequent-event systems that extends 
the time scale with high parallel efficiency. Integrating a replica of 
the system independently on each processor until the first transition 
occurs gives the correct transition-time distribution, and hence the 
correct dynamics. I obtain >90% efficiency simulating Cu(100) surface 
vacancy diffusion on 15 processors.

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