Detecting the quantum phase transition from the perspective of quantum information in the Aubry–André model  

作　　者：韦庚彪 叶柳 王栋 Geng-Biao Wei;Liu Ye;Dong Wang(School of Physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]School of Physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China

出　　处：《Chinese Physics B》2024年第7期171-176,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.12075001 and 12175001);Anhui Provincial Key Research and Development Plan(Grant No.2022b13020004);the Fund of CAS Key Laboratory of Quantum Information(Grant No.KQI201701)。

摘　　要：We investigate the effectiveness of entropic uncertainty, entanglement and steering in discerning quantum phase transitions(QPTs). Specifically, we observe significant fluctuations in entropic uncertainty as the driving parameter traverses the phase transition point. It is observed that the entropic uncertainty, entanglement and quantum steering, based on the electron distribution probability, can serve as indicators for detecting QPTs. Notably, we reveal an intriguing anticorrelation relationship between entropic uncertainty and entanglement in the Aubry–André model. Moreover, we explore the feasibility of detecting a QPT when the period parameter is a rational number. These observations open up new and efficient avenues for probing QPTs.

关 键 词：quantum phase transition entropic uncertainty quantum entanglement quantum steering 

分 类 号：O413[理学—理论物理]