The sign problem across the QCD phase transition

Jens. O. Andersen; Lars T. Kyllingstad; Kim Splittorff

doi:10.1007/jhep01(2010)055

The sign problem across the QCD phase transition

Jens. O. Andersen, Lars T. Kyllingstad, Kim Splittorff

10 Citations (Scopus)

Abstract

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.

Original language	English
Journal	Journal of High Energy Physics (Online)
Volume	2010
Issue number	1
Pages (from-to)	055
ISSN	1126-6708
DOIs	https://doi.org/10.1007/jhep01(2010)055
Publication status	Published - 4 Jan 2010

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title = "The sign problem across the QCD phase transition",

abstract = "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.",

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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.

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DO - 10.1007/jhep01(2010)055

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SP - 055

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

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The sign problem across the QCD phase transition

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