Tempered transitions between thimbles
Tempered transitions between thimbles
复制标题
顶针之间的缓和过渡
DOI:
10.1103/physrevd.96.034513
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
N. Warrington
中科院分区:
文献类型:
--
作者:
A. Alexandru;G. Basar;P. Bedaque;N. Warrington
Quantum field theories with complex actions cannot be investigated using importance sampling due to the sign problem. One possible solution is to use the holomorphic gradient flow, a method we introduced related to the Lefschetz thimbles idea. In many cases the probability distribution generated by this method is multi-modal and standard Monte-Carlo sampling fails. We propose an algorithm that incorporates tempered proposals to solve this problem. We apply this algorithm to the 0+1 dimensional Thirring model at finite density for a parameter set where standard sampling fails and show that tempered proposals cure this problem.