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Towards the phase diagram of dense two-color matter

Seamus Cotter, Pietro Giudice, Simon Hands, Jon-Ivar Skullerud

Physical Review D, Volume: 87, Issue: 3, Start page: 034507

Swansea University Author: Simon Hands

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DOI (Published version): 10.1103/PhysRevD.87.034507

Abstract

We study two-color QCD with two flavors of Wilson fermion as a function of quark chemical potential mu and temperature T. We find evidence of a superfluid phase at intermediate mu and low T where the quark number density and diquark condensate are both very well described by a Fermi sphere of nearly...

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Published in: Physical Review D
ISSN: 1550-7998 1550-2368
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa13404
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first_indexed 2013-07-23T12:10:09Z
last_indexed 2018-02-09T04:44:07Z
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spelling 2015-06-18T08:39:54.7164269 v2 13404 2012-12-03 Towards the phase diagram of dense two-color matter b34293f7370adc1d2cac9b93717a61c7 Simon Hands Simon Hands true false 2012-12-03 FGSEN We study two-color QCD with two flavors of Wilson fermion as a function of quark chemical potential mu and temperature T. We find evidence of a superfluid phase at intermediate mu and low T where the quark number density and diquark condensate are both very well described by a Fermi sphere of nearly-free quarks disrupted by a BCS condensate. Our results suggest that the quark contribution to the energy density is negative (and balanced by a positive gauge contribution), although this result is highly sensitive to details of the energy renormalisation. We also find evidence that the chiral condensate in this region vanishes in the massless limit. This region gives way to a region of deconfined quark matter at higher T and mu, with the deconfinement temperature, determined from the renormalised Polyakov loop, decreasing only very slowly with increasing chemical potential. The quark number susceptibility chi_q does not exhibit any qualitative change at the deconfinement transition. We argue that this is because chi_q is not an appropriate measure of deconfinement for 2-color QCD at high density Journal Article Physical Review D 87 3 034507 1550-7998 1550-2368 31 12 2013 2013-12-31 10.1103/PhysRevD.87.034507 arXiv:1210.4496 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2015-06-18T08:39:54.7164269 2012-12-03T08:52:52.3164670 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Seamus Cotter 1 Pietro Giudice 2 Simon Hands 3 Jon-Ivar Skullerud 4
title Towards the phase diagram of dense two-color matter
spellingShingle Towards the phase diagram of dense two-color matter
Simon Hands
title_short Towards the phase diagram of dense two-color matter
title_full Towards the phase diagram of dense two-color matter
title_fullStr Towards the phase diagram of dense two-color matter
title_full_unstemmed Towards the phase diagram of dense two-color matter
title_sort Towards the phase diagram of dense two-color matter
author_id_str_mv b34293f7370adc1d2cac9b93717a61c7
author_id_fullname_str_mv b34293f7370adc1d2cac9b93717a61c7_***_Simon Hands
author Simon Hands
author2 Seamus Cotter
Pietro Giudice
Simon Hands
Jon-Ivar Skullerud
format Journal article
container_title Physical Review D
container_volume 87
container_issue 3
container_start_page 034507
publishDate 2013
institution Swansea University
issn 1550-7998
1550-2368
doi_str_mv 10.1103/PhysRevD.87.034507
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
active_str 0
description We study two-color QCD with two flavors of Wilson fermion as a function of quark chemical potential mu and temperature T. We find evidence of a superfluid phase at intermediate mu and low T where the quark number density and diquark condensate are both very well described by a Fermi sphere of nearly-free quarks disrupted by a BCS condensate. Our results suggest that the quark contribution to the energy density is negative (and balanced by a positive gauge contribution), although this result is highly sensitive to details of the energy renormalisation. We also find evidence that the chiral condensate in this region vanishes in the massless limit. This region gives way to a region of deconfined quark matter at higher T and mu, with the deconfinement temperature, determined from the renormalised Polyakov loop, decreasing only very slowly with increasing chemical potential. The quark number susceptibility chi_q does not exhibit any qualitative change at the deconfinement transition. We argue that this is because chi_q is not an appropriate measure of deconfinement for 2-color QCD at high density
published_date 2013-12-31T03:15:20Z
_version_ 1763750256860725248
score 11.012678

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