弦、投影纠缠对态及变分蒙特卡洛方法
量子物理
2009-11-13 v3 强关联电子
摘要
我们引入了弦键态(string-bond states),这是一类通过在晶格上放置算子弦而获得的态,涵盖了量子信息中的相关态。对于弦键态,可以利用蒙特卡洛采样高效计算局部可观测量期望值,使其适用于将 DMRG 扩展到高维和不规则系统的变分算法。数值结果证明了这些态在多体系统模拟中的适用性。
引用
@article{arxiv.0708.1567,
title = {Strings, Projected Entangled Pair States, and variational Monte Carlo methods},
author = {Norbert Schuch and Michael M. Wolf and Frank Verstraete and J. Ignacio Cirac},
journal= {arXiv preprint arXiv:0708.1567},
year = {2009}
}
评论
4 pages. v2: Submitted version, containing more numerical data. Changed title and renamed "string states" to "string-bond states" to comply with PRL conventions. v3: Accepted version, Journal-Ref. added (title differs from journal)