Measurement-induced nonlocality based on affinity  

作　　者：R Muthuganesan V K Chandrasekar 

机构地区：[1]Centre for Nonlinear Science&Engineering,School of Electrical&Electronics Engineering,SASTRA Deemed University,Thanjavur—613401,Tamil Nadu,India

出　　处：《Communications in Theoretical Physics》2020年第7期42-48,共7页理论物理通讯（英文版）

基　　金：the CSIR EMR Grant No.03(1444)/18/EMR-Ⅱ。

摘　　要：Measurement-induced nonlocality(MIN),a quantum correlation measure for bipartite systems,is an indicator of maximal global effects due to locally invariant von Neumann projective measurements.It is originally defined as the maximal square of the Hilbert-Schmidt norm of the difference between pre-and post-measurement states.In this article,we propose a new form of MIN based on affinity.This quantity satisfies all the criteria of a bona fide measure of quantum correlation measures.This quantity is evaluated for both arbitrary pure and 2×n dimensional(qubit-qudit)mixed states.The operational meaning of the proposed quantity is interpreted in terms of the interferometric power of the quantum state.We apply these results on two-qubit mixed states,such as the Werner,isotropic and Bell diagonal states.

关 键 词：AFFINITY NONLOCALITY quantum correlation local measurements 

分 类 号：O413[理学—理论物理]