The sign problem across the QCD phase transition

TY - JOUR

T1 - The sign problem across the QCD phase transition

AU - Andersen, Jens. O.

AU - Kyllingstad, Lars T.

AU - Splittorff, Kim

PY - 2010/1/4

Y1 - 2010/1/4

N2 - The average phase factor of the QCD fermion determinant signals the strength of the QCD sign problem. We compute the average phase factor as a function of temperature and baryon chemical potential using a two-avor NJL model. This allows us to study the strength of the sign problem at and above the chiral transition. It is discussed how the U(1)A anomaly affects the sign problem. Finally, we study the interplay between the sign problem and the endpoint of the chiral transition.

AB - The average phase factor of the QCD fermion determinant signals the strength of the QCD sign problem. We compute the average phase factor as a function of temperature and baryon chemical potential using a two-avor NJL model. This allows us to study the strength of the sign problem at and above the chiral transition. It is discussed how the U(1)A anomaly affects the sign problem. Finally, we study the interplay between the sign problem and the endpoint of the chiral transition.

U2 - 10.1007/jhep01(2010)055

DO - 10.1007/jhep01(2010)055

M3 - Journal article

SN - 1126-6708

VL - 2010

SP - 055

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 1

ER -