Nonlocal advantage of quantum coherence and entanglement of two spins under intrinsic decoherence  

作　　者：Bao-Min Li Ming-Liang Hu Heng Fan 李保民;胡明亮;范桁(Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics B》2021年第7期33-38,共6页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.11774406 and 11934018);the National Key Research and Develepment Program of China(Grant Nos.2016YFA0302104 and 2016YFA0300600);the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB28000000);the Research Program of Beijing Academy of Quantum Information Sciences(Grant No.Y18G07)。

摘　　要：We investigate the nonlocal advantage of quantum coherence(NAQC)and entanglement for two spins coupled via the Heisenberg interaction and under the intrinsic decoherence.Solutions of this decoherence model for the initial spin-1/2 and spin-1 maximally entangled states are obtained,based on which we calculate the NAQC and entanglement.In the weak region of magnetic field,the NAQC behaves as a damped oscillation with the time evolves,while the entanglement decays exponentially(behaves as a damped oscillation)for the spin-1/2(spin-1)case.Moreover,the decay of both the NAQC and entanglement can be suppressed significantly by tuning the magnetic field and anisotropy of the spin interaction to some decoherence-rate-determined optimal values.

关 键 词：quantum coherence quantum entanglement intrinsic decoherence 

分 类 号：O413[理学—理论物理]