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Revisiting strong coupling QCD at finite temperature and baryon density

The strong coupling limit ($\beta_{gauge}=0$) of lattice QCD with staggered fermions enjoys the same non-perturbative properties as continuum QCD, namely confinement and chiral symmetry breaking. In contrast to the situation at weak coupling, the sign problem which appears at finite density can be b...

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Detalles Bibliográficos
Autores principales: Fromm, Michael, de Forcrand, Philippe
Lenguaje:eng
Publicado: 2008
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.066.0191
http://cds.cern.ch/record/1139558
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author Fromm, Michael
de Forcrand, Philippe
author_facet Fromm, Michael
de Forcrand, Philippe
author_sort Fromm, Michael
collection CERN
description The strong coupling limit ($\beta_{gauge}=0$) of lattice QCD with staggered fermions enjoys the same non-perturbative properties as continuum QCD, namely confinement and chiral symmetry breaking. In contrast to the situation at weak coupling, the sign problem which appears at finite density can be brought under control for a determination of the full (mu,T) phase diagram by Monte Carlo simulations. Further difficulties with efficiency and ergodicity of the simulations, especially at the strongly first-order, low-T, finite-mu transition, are addressed respectively with a worm algorithm and multicanonical sampling. Our simulations reveal sizeable corrections to the old results of Karsch and Muetter. Comparison with analytic mean-field determinations of the phase diagram shows discrepancies of O(10) in the location of the QCD critical point.
id cern-1139558
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2008
record_format invenio
spelling cern-11395582023-03-14T16:44:06Zdoi:10.22323/1.066.0191http://cds.cern.ch/record/1139558engFromm, Michaelde Forcrand, PhilippeRevisiting strong coupling QCD at finite temperature and baryon densityParticle Physics - LatticeThe strong coupling limit ($\beta_{gauge}=0$) of lattice QCD with staggered fermions enjoys the same non-perturbative properties as continuum QCD, namely confinement and chiral symmetry breaking. In contrast to the situation at weak coupling, the sign problem which appears at finite density can be brought under control for a determination of the full (mu,T) phase diagram by Monte Carlo simulations. Further difficulties with efficiency and ergodicity of the simulations, especially at the strongly first-order, low-T, finite-mu transition, are addressed respectively with a worm algorithm and multicanonical sampling. Our simulations reveal sizeable corrections to the old results of Karsch and Muetter. Comparison with analytic mean-field determinations of the phase diagram shows discrepancies of O(10) in the location of the QCD critical point.The strong coupling limit ($\beta_{gauge}=0$) of lattice QCD with staggered fermions enjoys the same non-perturbative properties as continuum QCD, namely confinement and chiral symmetry breaking. In contrast to the situation at weak coupling, the sign problem which appears at finite density can be brought under control for a determination of the full (mu,T) phase diagram by Monte Carlo simulations. Further difficulties with efficiency and ergodicity of the simulations, especially at the strongly first-order, low-T, finite-mu transition, are addressed respectively with a worm algorithm and multicanonical sampling. Our simulations reveal sizeable corrections to the old results of Karsch and Muetter. Comparison with analytic mean-field determinations of the phase diagram shows discrepancies of O(10) in the location of the QCD critical point.arXiv:0811.1931CERN-PH-TH-2008-217oai:cds.cern.ch:11395582008-11-13
spellingShingle Particle Physics - Lattice
Fromm, Michael
de Forcrand, Philippe
Revisiting strong coupling QCD at finite temperature and baryon density
title Revisiting strong coupling QCD at finite temperature and baryon density
title_full Revisiting strong coupling QCD at finite temperature and baryon density
title_fullStr Revisiting strong coupling QCD at finite temperature and baryon density
title_full_unstemmed Revisiting strong coupling QCD at finite temperature and baryon density
title_short Revisiting strong coupling QCD at finite temperature and baryon density
title_sort revisiting strong coupling qcd at finite temperature and baryon density
topic Particle Physics - Lattice
url https://dx.doi.org/10.22323/1.066.0191
http://cds.cern.ch/record/1139558
work_keys_str_mv AT frommmichael revisitingstrongcouplingqcdatfinitetemperatureandbaryondensity
AT deforcrandphilippe revisitingstrongcouplingqcdatfinitetemperatureandbaryondensity