Quantum Monte Carlo for gauge fields and matter without the fermion determinant

Abstract

Ab initio Monte Carlo simulations of strongly interacting fermionic systems are plagued by the fermion sign problem, making the nonperturbative study of many interesting regimes of dense quantum matter, or of theories of odd numbers of fermion flavors, challenging. Moreover, typical fermion algorithms require the computation (or sampling) of the fermion determinant. We focus instead on the meron cluster algorithm, which can solve the fermion sign problem in a class of models without involving the determinant. We develop and benchmark new meron algorithms to simulate fermions coupled to ℤ2 and

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ORCID for Debasish Banerjee: orcid.org/0000-0003-0244-4337

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