Sharing quantum nonlocality in the noisy scenario  

作　　者：杨舒媛 侯晋川 贺衎 Shu-Yuan Yang;Jin-Chuan Hou;Kan He(College of Mathematics,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]College of Mathematics,Taiyuan University of Technology,Taiyuan 030024,China

出　　处：《Chinese Physics B》2024年第1期199-211,共13页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.12271394 and 12071336);the Key Research and Development Program of Shanxi Province (Grant No.202102010101004)。

摘　　要：It was showed in [Phys. Rev. Lett. 125 090401(2020)] that there exist unbounded number of independent Bobs who can share quantum nonlocality with a single Alice by performing sequentially measurements on the Bob's half of the maximally entangled pure two-qubit state. However, from practical perspectives, errors in entanglement generation and noises in quantum measurements will result in the decay of nonlocality in the scenario. In this paper, we analyze the persistency and termination of sharing nonlocality in the noisy scenario. We first obtain the two sufficient conditions under which there exist n independent Bobs who can share nonlocality with a single Alice under noisy measurements and the noisy initial two qubit entangled state. Analyzing the two conditions, we find that the influences on persistency under different kinds of noises can cancel each other out. Furthermore, we describe the change patterns of the maximal nonlocality-sharing number under the influence of different noises. Finally, we extend our investigation to the case of arbitrary finite-dimensional systems.

关 键 词：Bell nonlocality quantum measurement quantum noise 

分 类 号：O413[理学—理论物理]