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SUMMARY:The fermion sign problem and large N orbifold equivalence - Alekse
 y Cherman (DAMTP\, University of Cambridge)
DTSTART:20101119T141500Z
DTEND:20101119T151500Z
UID:TALK27628@talks.cam.ac.uk
CONTACT:19219
DESCRIPTION:I will discuss a recent proposal that may give a way to study 
 the finite-density physics of large N QCD on the lattice\, by using some s
 pecial properties of the large N limit to dodge the fermion sign problem i
 n large N QCD.  The proposal is based on the observation that SO(Nc) 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 Mon
 te Carlo simulations to study this theory at finite density. The relevance
  of this to large N QCD\, an SU(N) gauge theory\, is that a wide class of 
 observables in the SO(Nc) theory coincide with observables in QCD in the l
 arge N limit\, as can be shown using the technique of large Nc orbifold eq
 uivalence. I will argue that the orbifold equivalence between the two theo
 ries continues to hold at μB ≠ 0 provided one modifies the SO(Nc) theor
 y in a certain way. This opens up the prospect of learning about QCD at μ
 B ≠ 0 using lattice studies of the SO(Nc) theory.\n
LOCATION:MR11 (Malcolm Room)\, Pavilion B\, DAMTP\, CMS
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