Finite density QCD via imaginary chemical potential

Abstract

We study QCD at nonzero temperature and baryon density in the framework of the analytic continuation from imaginary chemical potential. We carry out simulations of QCD with four flavor of staggered fermions, and reconstruct the phase diagram in the temperature-imaginary μplane. We consider ansätze for the analytic continuation of the critical line and other observables motivated both by theoretical considerations and mean field calculations in four fermion models and random matrix theory. We determine the critical line, and the analytic continuation of the chiral condensate, up to μ_B approx. 500 MeV. The results are in qualitative agreement with the predictions of model field theories, and consistent with a first order chiral transition. The correlation between the chiral transition and the deconfinement transition observed at μ=0 persists at nonzero density.

27 pages, 10 figures, comments and references added

References in corpus (10)

• The QCD equation of state at nonzero densities: lattice result
• The factorization method for systems with a complex action -a test in Random Matrix Theory for finite density QCD-
• Lattice QCD Results at Finite Temperature and Density
• The quark mass and $\mu$ dependence of the QCD chiral critical point
• High temperature QCD with three flavors of improved staggered quarks
• QCD phase diagram for small densities from simulations at imaginary mu
• The QCD equation of state at finite T and μ
• Imaginary chemical potential in QCD at finite temperature
• A proposal for simulating QCD at finite chemical potential on the lattice
• Composite reweighting with Imaginary Chemical Potentials in SU(3)

Cited by in corpus (376)

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• The Phase Diagram of Hadronic Matter
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• Lattice QCD at finite T and μ
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• From Cosmic Matter to the Laboratory
• Results from Lattice QCD
• Extrapolation for meson screening masses from imaginary to real chemical potential
• Constraints for the QCD phase diagram from imaginary chemical potential
• Analytic continuation in QCD-like theories at finite density and finite isospin
• Taming the pion condensation in QCD at finite baryon density
• A0--condensation in quark-gluon plasma with finite baryon density
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