Correlation-induced coherence and its use in detecting quantum phase transitions

作     者：Ming-Ming Du Abdul Sattar Khan Zhao-Yi Zhou Da-Jian Zhang 

作者机构：Department of PhysicsShandong UniversityJinan 250100China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2022年第65卷第10期

页      面：29-37页

核心收录：

学科分类：07[理学] 0703[理学-化学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11775129  and 12174224) 

主　　题：correlation measures coherence measures quantum phase transitions 

摘      要：The past two decades have witnessed a surge of interest in exploring correlation and coherence measures to investigate quantum phase transitions(QPTs). Here, motivated by the continued push along this direction, we propose a measure which is built upon the so-called degree of coherence, and advocate using the susceptibility of our measure to detect QPTs. We show that our measure can capture both the notions of coherence and correlations exhibited in bipartite states and therefore represents a hybrid of these two notions. Through examining the XXZ model and the Kitaev honeycomb model, we demonstrate that our measure is favorable for detecting QPTs in comparison to many previous proposals.