Canonical and Grand Canonical Ensemble Expectation Values from Quantum Monte Carlo Simulations

Details Canonical and Grand Canonical Ensemble Expectation Values from Quantum Monte Carlo Simulations Canonical and Grand Canonical Ensemble Expectation Values from Quantum Monte Carlo Simulations

2003-02-14

arxiv.org/abs/cond-mat/0302281v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.68.045120

We show how canonical ensemble expectation values can be extracted from quantum Monte Carlo simulations in the grand canonical ensemble. In order to obtain results for all particle sectors, a modest number of grand canonical simulations must be performed, each at a different chemical potential. From the canonical ensemble results, grand canonical expectation values can be extracted as a continuous function of the chemical potential. Results are presented from the application of this method to the two-dimensional Hubbard model.

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