QCD Phase Diagram According to the Center Group

Ydalia Delgado Mercado, Hans Gerd Evertz, and Christof Gattringer
Phys. Rev. Lett. 106, 222001 – Published 3 June 2011

Abstract

We study an effective theory for QCD at finite temperature and density which contains the leading center symmetric and center symmetry breaking terms. The effective theory is studied in a flux representation where the complex phase problem is absent and the model becomes accessible to Monte Carlo techniques also at finite chemical potential. We simulate the system by using a generalized Prokof’ev-Svistunov worm algorithm and compare the results to a low temperature expansion. The phase diagram is determined as a function of temperature, chemical potential, and quark mass. The shape and quark mass dependence of the phase boundaries are as expected for QCD. The transition into the deconfined phase is smooth throughout, without any discontinuities or critical points.

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  • Received 16 February 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.222001

© 2011 American Physical Society

Authors & Affiliations

Ydalia Delgado Mercado1, Hans Gerd Evertz2, and Christof Gattringer1

  • 1Institut für Physik, Karl-Franzens Universität, Graz, Austria
  • 2Institute for Theoretical and Computational Physics, Technische Universität Graz, Austria

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Issue

Vol. 106, Iss. 22 — 3 June 2011

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