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Improving the Robustness of Entangled States by Basis Transformation

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成果类型:
期刊论文
作者:
Wang, Xin-Wen*;Tang, Shi-Qing;Liu, Yan;Yuan, Ji-Bing
通讯作者:
Wang, Xin-Wen
作者机构:
[Liu, Yan; Yuan, Ji-Bing; Wang, Xin-Wen; Tang, Shi-Qing] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
[Liu, Yan; Yuan, Ji-Bing; Wang, Xin-Wen; Tang, Shi-Qing] Hengyang Normal Univ, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
[Wang, Xin-Wen; Tang, Shi-Qing] Hunan Normal Univ, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.
通讯机构:
[Wang, Xin-Wen] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
[Wang, Xin-Wen] Hengyang Normal Univ, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.
[Wang, Xin-Wen] Hunan Normal Univ, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.
语种:
英文
关键词:
Basis transformation;Cat-like states;Entanglement robustness;Local Pauli noises;Robustness-enhancement method
期刊:
Entropy
ISSN:
1099-4300
年:
2019
卷:
21
期:
1
文献类别:
WOS:Article
所属学科:
ESI学科类别:物理学;WOS学科类别:Physics, Multidisciplinary
入藏号:
基金类别:
NSFC [11847010]; Scientific Research Fund of Hunan Provincial Education Department [15A028, 16B036]; HNNSF [2017JJ3005]; Science and Technology Plan Project of Hunan Province [2016TP1020]; Open Fund Project of Hunan Provincial Key Laboratory of Intelligent Information Processing and Application for Hengyang Normal University [IIPA18K07]; Hunan Provincial Applied Basic Research Base of Optoelectronic Information Technology [GD18K03]; Open Fund of Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education [QSQC1702]
机构署名:
本校为第一且通讯机构
院系归属:
物理与电子工程学院
摘要:
In the practical application of quantum entanglement, entangled particles usually need to be distributed to many distant parties or stored in different quantum memories. In these processes, entangled particles unavoidably interact with their surrounding environments, respectively. We here systematically investigate the entanglement-decay laws of cat-like states under independent Pauli noises with unbalanced probability distribution of three kinds of errors. We show that the robustness of cat-like entangled states is not only related to the overall noise strength and error distribution parameters, but also to the basis of qubits. Moreover, we find that whether a multi-qubit state is more robust in the computational basis or transversal basis depends on the initial entanglement and number of qubits of the state as well as the overall noise strength and error distribution parameters of the environment. However, which qubit basis is conductive to enhancing the robustness of two-qubit states is only dependent on the error distribution parameters. These results imply that one could improve the intrinsic robustness of entangled states by simply transforming the qubit basis at the right moment. This robustness-improving method does not introduce extra particles and works in a deterministic manner. © 2019 by the authors.
参考文献:
Ali M, 2014, J PHYS B-AT MOL OPT, V47, DOI 10.1088/0953-4075/47/5/055503
Aolita L, 2010, PHYS REV A, V82, DOI 10.1103/PhysRevA.82.032317
Aolita L, 2015, REP PROG PHYS, V78, DOI 10.1088/0034-4885/78/4/042001
Arthur TT, 2018, QUANTUM INF PROCESS, V17, DOI 10.1007/s11128-017-1800-y
Aschauer H, 2005, PHYS REV A, V71, DOI 10.1103/PhysRevA.71.012319

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