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Anatomy of the sign-problem in heavy-dense QCD

Garron, N; Langfeld, K; Bechtle, P; Beck, HP; Becker, K; Becker, M; Beckingham, M; ... Zwalinski, L; + view all (2016) Anatomy of the sign-problem in heavy-dense QCD. European Physical Journal C , 76 , Article 569. 10.1140/epjc/s10052-016-4412-2. Green open access

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Abstract

QCD at finite densities of heavy quarks is investigated using the density-of-states method. The phase factor expectation value of the quark determinant is calculated to unprecedented precision as a function of the chemical potential. Results are validated using those from a reweighting approach where the latter can produce a significant signal-to-noise ratio. We confirm the particle–hole symmetry at low temperatures, find a strong sign problem at intermediate values of the chemical potential, and an inverse Silver Blaze feature for chemical potentials close to the onset value: here, the phase-quenched theory underestimates the density of the full theory.

Type: Article
Title: Anatomy of the sign-problem in heavy-dense QCD
Open access status: An open access version is available from UCL Discovery
DOI: 10.1140/epjc/s10052-016-4412-2
Publisher version: http://dx.doi.org/10.1140/epjc/s10052-016-4412-2
Additional information: © The Author(s) 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecomm ons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.
Keywords: Science & Technology, Physical Sciences, Physics, Particles & Fields, Physics, CHAPLYGIN-GAS, EINSTEIN EQUATIONS, EXTENDED THEORIES, MODIFIED GRAVITY, F(R) THEORIES, DARK-MATTER, SINGULARITIES, UNIVERSALITY, UNIFICATION, ENERGY
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/1532692
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