Practical approach to the sign problem at finite theta-vacuum angle
High Energy Physics - Phenomenology
2013-03-22 v1
Abstract
We investigate a way of circumventing the sign problem in lattice QCD simulations with a theta-vacuum term, using the PNJL model. We consider the reweighting method for the QCD Lagrangian after the U_A(1) transformation. In the Lagrangian, the P-odd mass term as a cause of the sign problem is minimized. In order to find out a good reference system in the reweighting method, we estimate the average reweighting factor by using the two-flavor PNJL model and eventually find a good reference system.
Cite
@article{arxiv.1303.5169,
title = {Practical approach to the sign problem at finite theta-vacuum angle},
author = {Takahiro Sasaki and Hiroaki Kouno and Masanobu Yahiro},
journal= {arXiv preprint arXiv:1303.5169},
year = {2013}
}
Comments
6 pages, 7 figures. Accepted for publication in Phys. Rev. D. Substantial text overlap with arXiv:1208.0375