Model approach to the sign problem on lattice QCD with theta vacuum

Takahiro Sasaki, Junichi Takahashi, Yuji Sakai, Hiroaki Kouno, Masanobu Yahiro

研究成果: Contribution to journalConference article査読

1 被引用数 (Scopus)


We propose a practical way of circumventing the sign problem in lattice QCD simulations with a theta-vacuum term. This method is the reweighting method for the QCD Lagrangian after the SUA(3)?UA(1) transformation. In the Lagrangian, the P-odd mass term as a cause of the sign problem is minimized. Additionally, we investigate theta-vacuum effects on the QCD phase diagram for the realistic 2+1 flavor system, using the three-flavor Polyakov-extended Nambu-Jona- Lasinio (PNJL) model and the entanglement PNJL model as an extension of the PNJL model. The theta-vacuum effects make the chiral transition sharper. We finally investigate theta dependence of the transition temperature and compare with the result of the pure gauge lattice simulation with imaginary theta parameter.

ジャーナルProceedings of Science
Part F130497
出版ステータス出版済み - 2012
イベント30th International Symposium on Lattice Field Theory, Lattice 2012 - Cairns, オーストラリア
継続期間: 6 24 20126 29 2012

All Science Journal Classification (ASJC) codes

  • 一般


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