No sign problem in one-dimensional path integral Monte Carlo simulation of fermions: A topological proof.
basic_science · Level V
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- Record sourced from PubMed, PMID 37073069.
- Also identified by DOI 10.1103/PhysRevE.107.035305.
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Abstract
This paper shows that, in one dimension, due to its topology, a closed-loop product of short-time propagators is always positive, despite the fact that each antisymmetric free fermion propagator can be of either sign.