Entropic uncertainty relation of a qubit–qutrit Heisenberg spin model and its steering  

作　　者：Feng-He Ju Zuo-Yuan Zhang Jin-Ming Liu 

机构地区：[1]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China

出　　处：《Communications in Theoretical Physics》2020年第12期123-129,共7页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.91950112 and 11174081;the National Key Research and Development Program of China under Grant No.2016YFB0501601。

摘　　要：We investigate the quantum-memory-assisted entropic uncertainty relation(QMA-EUR)in a Heisenberg XYZ mixed-spin(1/2,1)model.Coupling strength,Dzyaloshinskii–Moriya(DM)interaction and inhomogeneous magnetic field,respectively,contributing to QMA-EUR by a thermal entanglement in the hybrid-spin model are studied in detail.Furthermore,we compare the uncertainty of the bipartite hybrid model with those of qubit–qubit and qutrit–qutrit systems.Meanwhile,the effects of local PT-symmetric operation and weak measurement on the steering of entropic uncertainty are analyzed.We find that the local PT-symmetric operation can reduce the entropic uncertainty,and the entropic uncertainty can also be decreased by weak measurement reversal.

关 键 词：entropic uncertainty relation Heisenberg XYZ model weak measurement PT-symmetry 

分 类 号：O413[理学—理论物理]