自旋-1/2与无自旋费米子量子链系统中两种纠缠度量的关系
量子物理
2009-11-13 v2
摘要
并发度(concurrence)与模并发度(mode concurrence)分别是自旋-1/2与无自旋费米子系统的纠缠度量。基于Jordan-Wigner变换,任意自旋-1/2系统总联系着一个费米子系统(称为对应系统)。借助自旋-1/2 XXZ 与无自旋费米子链系统基态的Marshall符号规则,可对并发度与模并发度进行比较。我们观察到这两个对应系统基态的并发度与模并发度之间存在一个不等式。以自旋-1/2 XY链系统及其无自旋费米子对应系统作为实际例子讨论,以证明解析结果。
引用
@article{arxiv.quant-ph/0604108,
title = {Relation between two measures of entanglement in spin-1/2 and spinless fermion quantum chain systems},
author = {Xiao-Feng Qian and Z. Song},
journal= {arXiv preprint arXiv:quant-ph/0604108},
year = {2009}
}
备注
7 pages, no figures, publication version, to appear in PRA