Imaginary chemical potential approach for the pseudocritical line in the QCD phase diagram with clover-improved Wilson fermions

Physical Review D Volume 83 Page 114507-1-114507-9 published_at 2011-06-13
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Title ( eng )
Imaginary chemical potential approach for the pseudocritical line in the QCD phase diagram with clover-improved Wilson fermions
Creator
Nagata Keitaro
Source Title
Physical Review D
Volume 83
Start Page 114507-1
End Page 114507-9
Abstract
The QCD phase diagram is studied in the lattice QCD simulation with the imaginary chemical potential approach. We employ a clover-improved Wilson fermion action of two flavors and a renormalization-group improved gauge action and perform the simulation at an intermediate quark mass on a 8^3×4 lattice. The QCD phase diagram in the imaginary chemical potential μ_I region is investigated by performing the simulation for more than 150 points on the (β,μ_I) plane. We find that the Roberge-Weiss phase transition at μ_I/T=π/3 is first order and its endpoint is second order, which are identified by the phase of the Polyakov loop. We determine the pseudocritical line from the susceptibility of the Polyakov loop modulus. We find a clear deviation from a linear dependence of the pseudocritical line on μ^2_1.
NDC
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2011-06-13
Rights
Copyright (c) 2011 The American Physical Society
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 1550-7998
[DOI] 10.1103/PhysRevD.83.114507
[NCID] AA00773624
[DOI] http://dx.doi.org/10.1103/PhysRevD.83.114507