Continuous Time Quantum Monte Carlo Method for Fermions: Beyond Auxiliary Field Framework
强关联电子
2009-11-10 v1
摘要
Numerically exact continuous-time Quantum Monte Carlo algorithm for finite fermionic systems with non-local interactions is proposed. The scheme is particularly applicable for general multi-band 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 multi-orbital super-symmetric impurity model with a spin-flip interaction are presented.
引用
@article{arxiv.cond-mat/0408009,
title = {Continuous Time Quantum Monte Carlo Method for Fermions: Beyond Auxiliary Field Framework},
author = {A. N. Rubtsov and A. I. Lichtenstein},
journal= {arXiv preprint arXiv:cond-mat/0408009},
year = {2009}
}