The sign problem across the QCD phase transition
arXiv:0909.2771 · doi:10.1007/JHEP01(2010)055
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-flavor NJL model. This allows us to study the strength of the sign problem at and above the chiral transition. It is discussed how the anomaly affects the sign problem. Finally, we study the interplay between the sign problem and the endpoint of the chiral transition.
9 pages and 9 figs
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- Average phase factor in the PNJL model
- Tan's contact and the phase distribution of repulsive Fermi gases: Insights from QCD noise analyses
- Random matrix models for phase diagrams
- A practical solution to the sign problem at finite theta-vacuum angle
- Practical approach to the sign problem at finite theta-vacuum angle
- Some exact results on the QCD critical point