Quantum block coherence with respect to projective measurements  

作　　者：王璞 李忠艳 孟会贤 Pu Wang;Zhong-Yan Li;Hui-Xian Meng(School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China;School of Mathematics and Physics,North China Electric Power University,Beijing 102206,China)

机构地区：[1]School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China [2]School of Mathematics and Physics,North China Electric Power University,Beijing 102206,China

出　　处：《Chinese Physics B》2024年第8期213-220,共8页中国物理B（英文版）

基　　金：partially supported by the National Natural Science Foundations of China (Grant No.11901317);the China Postdoctoral Science Foundation (Grant No.2020M680480);the Fundamental Research Funds for the Central Universities (Grant No.2023MS078);the Beijing Natural Science Foundation (Grant No.1232021)。

摘　　要：Quantum coherence serves as a defining characteristic of quantum mechanics,finding extensive applications in quantum computing and quantum communication processing.This study explores quantum block coherence in the context of projective measurements,focusing on the quantification of such coherence.Firstly,we define the correlation function between the two general projective measurements P and Q,and analyze the connection between sets of block incoherent states related to two compatible projective measurements P and Q.Secondly,we discuss the measure of quantum block coherence with respect to projective measurements.Based on a given measure of quantum block coherence,we characterize the existence of maximal block coherent states through projective measurements.This research integrates the compatibility of projective measurements with the framework of quantum block coherence,contributing to the advancement of block coherence measurement theory.

关 键 词：quantum coherence compatibility projective measurement quantum block coherence 

分 类 号：O413.1[理学—理论物理]