Continuous-time quantum Monte Carlo method for fermions: Beyond auxiliary field frameworkстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A numerically exact continuous-time quantum Monte Carlo algorithm for finite fermionic systems with nonlocal interactions is proposed. The scheme is particularly applicable for general multiband time-dependent correlations, since it does not invoke Hubbard-Stratonovich transformation. The present determinantal grand-canonical method is based on a stochastic series expansion for the partition function in the interaction representation. The results for the Green function and for the time-dependent susceptibility of multiorbital supersymmetric impurity model with a spin-flip interaction are presented. (C) 2004 MAIK “Nauka / Interperiodica”.