TY - JOUR

T1 - Orbifold equivalence and the sign problem at finite Baryon density

AU - Cherman, Aleksey

AU - Hanada, Masanori

AU - Robles-Llana, Daniel

N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2011/3/3

Y1 - 2011/3/3

N2 - We point out that SO(2Nc) gauge theory with Nf fundamental Dirac fermions does not have a sign problem at finite baryon number chemical potential μB. One can thus use lattice Monte Carlo simulations to study this theory at finite density. The absence of a sign problem in the SO(2Nc) theory is particularly interesting because a wide class of observables in the SO(2Nc) theory coincide with observables in QCD in the large Nc limit, as we show using the technique of large Nc orbifold equivalence. We argue that the orbifold equivalence between the two theories continues to hold at finite μB provided one adds appropriate deformation terms to the SO(2Nc) theory. This opens up the prospect of learning about QCD at finite μB using lattice studies of the SO(2Nc) theory.

AB - We point out that SO(2Nc) gauge theory with Nf fundamental Dirac fermions does not have a sign problem at finite baryon number chemical potential μB. One can thus use lattice Monte Carlo simulations to study this theory at finite density. The absence of a sign problem in the SO(2Nc) theory is particularly interesting because a wide class of observables in the SO(2Nc) theory coincide with observables in QCD in the large Nc limit, as we show using the technique of large Nc orbifold equivalence. We argue that the orbifold equivalence between the two theories continues to hold at finite μB provided one adds appropriate deformation terms to the SO(2Nc) theory. This opens up the prospect of learning about QCD at finite μB using lattice studies of the SO(2Nc) theory.

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U2 - 10.1103/PhysRevLett.106.091603

DO - 10.1103/PhysRevLett.106.091603

M3 - Article

C2 - 21405616

AN - SCOPUS:79952285648

VL - 106

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 9

M1 - 091603

ER -