Mathphys seminar:Sneaking up on dense QCD using large N methods
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Asia/Tokyo
Main Research Building, room 248
Main Research Building, room 248
Description
日時：２月６日(月) 13：30から１時間程度
Feb. 6th, 13:30-15:00
場所：研究本館248室（橋本数理物理研セミナー室）
Main Research Building, room 248
Lecturer：Dr. Aleksey Cherman (Cambridge u)
講演タイトル :
Sneaking up on dense QCD using large N methods
Abstract:
Finite-density QCD notoriously suffers from the fermion sign
problem, which makes lattice Monte Carlo simulations essentially
impossible. As a result, we have little non-perturbative information on
the behavior of QCD at finite baryon number density. I will discuss a
recent proposal to dodge the sign problem by exploiting orbifold
equivalence, a property of the large N limit of QCD. The proposal starts
with the observation that if the gauge group of QCD is changed from
SU(N) to SO(N), the sign problem does not appear at finite baryon number
chemical potential, and the resulting theory can be studied on the
lattice. Despite this seemingly drastic change, it turns out that there
is a large N orbifold equivalence between the SO(N) theory and SU(N)
QCD. I will argue that with some extra work, the equivalence can be
made to hold at finite chemical potential, while the SO theory does not
have a sign problem. This opens up the prospect of learning about QCD at
finite baryon number density using lattice studies of the SO(N) theory.
講演言語 Language：English
