TY - JOUR

T1 - Phase quenching in finite-density QCD

T2 - 30th International Symposium on Lattice Field Theory, Lattice 2012

AU - Hanada, Masanori

AU - Matsuo, Yoshinori

AU - Yamamoto, Naoki

PY - 2012/1/1

Y1 - 2012/1/1

N2 - Finite-density QCD is difficult to study numerically because of the sign problem. We prove that, in a certain region of the phase diagram, the phase quenched approximation is exact to O(Nf =Nc). It is true for any physical observables. We also consider the implications for the lattice simulations and find a quantitative evidence for the validity of the phase quenching from existing lattice QCD results at Nc = 3. Our results show that the phase-quench approximation is rather good already at Nc = 3, and the 1=Nc correction can be incorporated by the phase reweighting method without suffering from the overlap problem. We also show the same equivalence in effective models and holographic models.

AB - Finite-density QCD is difficult to study numerically because of the sign problem. We prove that, in a certain region of the phase diagram, the phase quenched approximation is exact to O(Nf =Nc). It is true for any physical observables. We also consider the implications for the lattice simulations and find a quantitative evidence for the validity of the phase quenching from existing lattice QCD results at Nc = 3. Our results show that the phase-quench approximation is rather good already at Nc = 3, and the 1=Nc correction can be incorporated by the phase reweighting method without suffering from the overlap problem. We also show the same equivalence in effective models and holographic models.

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M3 - Conference article

AN - SCOPUS:85030110613

VL - Part F130497

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 064

Y2 - 24 June 2012 through 29 June 2012

ER -