Europhys. Lett., 63 (4) , pp. 479-484 (2003)
Monte Carlo methods via the use of the central-limit theoremE. G. Thrapsaniotis
Sussex Centre for Optical and Atomic Physics, University of Sussex Falmer, Brighton BN1 9QH, UK email@example.com
(Received 29 January 2003; accepted 13 June 2003)
In the present letter we give a new method to handle the sign problem. In fact we apply the central-limit theorem on the phase, which appears in the expression of the Monte Carlo after certain manipulations. Then we can use standard methods to calculate the two expressions that appear. In fact we manage to reduce real-time integration to a case similar to imaginary-time integration. The present method can be combined with other methods such as the stationary-phase Monte Carlo methods are. We apply the present theory to the path integral representation of the time displacement amplitude.
02.70.Tt - Justifications or modifications of Monte Carlo methods.
02.70.Ss - Quantum Monte Carlo methods.
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