Ascertaining the influences of auxiliary qubits on the Einstein-Podolsky-Rosen steering and its directions

邢玲玲 ¹杨欢 ¹张刚 ¹孔敏¹

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作者信息

1. School of Electrical and Photoelectronic Engineering,West Anhui University,Lu'an 237012,China
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Abstract

Einstein-Podolsky-Rosen(EPR)steering is an example of nontrivial quantum nonlocality and characteristic in the non-classical world.The directivity(or asymmetry)is a fascinating trait of EPR steering,and it is different from other quantum nonlocalities.Here,we consider the strategy in which two atoms compose a two-qubit X state,and the two atoms are owned by Alice and Bob,respectively.The atom of Alice suffers from a reservoir,and the atom of Bob couples with a bit flip channel.The influences of auxiliary qubits on EPR steering and its directions are revealed by means of the entropy uncertainty relation.The results indicate that EPR steering declines with growing time t when adding fewer auxiliary qubits.The EPR steering behaves as damped oscillation when introducing more auxiliary qubits in the strong coupling regime.In the weak coupling regime,the EPR steering monotonously decreases as t increases when coupling auxiliary qubits.The increases in auxiliary qubits are responsible for the fact that the steerability from Alice to Bob(or from Bob to Alice)can be more effectively revealed.Notably,the introductions of more auxiliary qubits can change the situation that steerability from Alice to Bob is certain to a situation in which steerability from Bob to Alice is certain.

Key words

auxiliary qubits/EPR steering/directions/influence

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基金项目

国家自然科学基金(12175001)

Key Project of Natural Science Research of West Anhui University(WXZR202311)

Natural Science Research Key Project of Education Department of Anhui Province of China(KJ2021A0943)

Natural Science Research Key Project of Education Department of Anhui Province of China(2022AH051681)

Natural Science Research Key Project of Education Department of Anhui Province of China(2023AH052648)

Open Fund of Anhui Undergrowth Crop Intelligent Equipment Engineering Research Center(AUCIEERC-2022-01)

Anhui Undergrowth Crop Intelligent Equipment Engineering Research Center(2022AH010091)

University Synergy Innovation Program of Anhui Province(GXXT-2021-026)

安徽省自然科学基金(2108085MA18)

安徽省自然科学基金(2008085MA20)

Key Project of Program for Excellent Young Talents of Anhui Universities(gxyqZD2019042)

open project of the Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes(FMDI202106)

research startup funding project of High Level Talent of West Anhui University(WGKQ2021048)

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

参考文献量40

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