Quasi-random approach in the grid application SALUTE

Authors:
Emanouil Atanassov;Aneta Karaivanova;Todor Gurov
Affiliations:
Institute for Parallel Processing, Bulgarian Academy of Sciences, Sofia, Bulgaria;Institute for Parallel Processing, Bulgarian Academy of Sciences, Sofia, Bulgaria;Institute for Parallel Processing, Bulgarian Academy of Sciences, Sofia, Bulgaria
Venue:
PPAM'09 Proceedings of the 8th international conference on Parallel processing and applied mathematics: Part II
Year:
2009

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Abstract

Stochastic ALgorithms for Ultra-fast Transport in sEmiconductors (SALUTE) is a Grid application which integrates a set of novel Monte Carlo, quasi-Monte Carlo and hybrid algorithms for solving various computationally intensive problems important for industry (design of modern semiconductor devices). SALUTE studies memory and quantum effects during the femtosecond relaxation process due to electron-phonon interaction in one-band semiconductors or quantum wires. There are two main reasons for running this application on the Grid: (i) quantum problems are very computationally intensive; (ii) the inherently parallel nature of Monte Carlo applications makes efficient use of Grid resources. In this paper we study the quasirandom approach in SALUTE, using the scrambled Halton, Sobol and Niederreiter sequences. A large number of tests have been performed on the SEEGRID grid infrastructure using specially developed grid implementation scheme. Novel results for energy and density distribution, obtained in the inhomogeneous case with applied electric field are presented.