Density of states approach to dense quantum systems

Langfeld, Kurt ORCID: 0000-0002-4368-3580 and Lucini, Biagio (2014) Density of states approach to dense quantum systems. PHYSICAL REVIEW D, 90 (9). 094502-.

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Abstract

We develop a first-principle generalised density of state method for studying numerically quantum field theories with a complex action. As a proof of concept, we show that with our approach we can solve numerically the strong sign problem of the $Z_3$ spin model at finite density. Our results are confirmed by standard simulations of the theory dual to the considered model, which is free from a sign problem. Our method opens new perspectives on ab initio simulations of cold dense quantum systems, and in particular of Yang-Mills theories with matter at finite densities, for which Monte Carlo based importance sampling are unable to produce sufficiently accurate results.

Item Type:	Article
Additional Information:	4 pages, 3 figures
Uncontrolled Keywords:	hep-lat, hep-lat, hep-ph, hep-th
Depositing User:	Symplectic Admin
Date Deposited:	07 Jul 2016 10:28
Last Modified:	19 Jan 2023 07:34
DOI:	10.1103/PhysRevD.90.094502
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3002142