منابع مشابه
Interaction picture density matrix quantum Monte Carlo.
The recently developed density matrix quantum Monte Carlo (DMQMC) algorithm stochastically samples the N-body thermal density matrix and hence provides access to exact properties of many-particle quantum systems at arbitrary temperatures. We demonstrate that moving to the interaction picture provides substantial benefits when applying DMQMC to interacting fermions. In this first study, we focus...
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This identity allows to map interacting fermion system onto the system of noninteracting fermions coupled with fluctuating auxilary field. One uses a path integral formulation of a problem to eliminate the interaction term. We divide the imaginary time interbal [0, β] into Lequal subintervals of width ∆τ : L∆τ = β. After doing that we can rewrite equation for the partitionfunction Z as: Z = Tre...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2014
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.89.245124