量子相变
忠诚
量子相
量子
基态
物理
奇点
相变
统计物理学
缩放比例
自旋(空气动力学)
量子信息科学
理论物理学
量子力学
计算机科学
数学
量子纠缠
几何学
热力学
电信
作者
Shu Chen,Li Wang,Yajiang Hao,Yupeng Wang
标识
DOI:10.1103/physreva.77.032111
摘要
The notion of fidelity in quantum information science has been recently applied to analyze quantum phase transitions from the viewpoint of the ground-state (GS) overlap for various many-body systems. In this work, we unveil the intrinsic relation between the GS fidelity and the derivatives of GS energy and find that they play an equivalent role in identifying the quantum phase transition. The general connection between the two approaches enables us to understand the different singularity and scaling behaviors of fidelity exhibited in various systems on general grounds. Our general conclusions are illustrated via several quantum spin models which exhibit different kinds of quantum phase transitions.
科研通智能强力驱动
Strongly Powered by AbleSci AI