One-step distillation of local-unitary-equivalent GHZ-type states

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成果类型：

期刊论文

作者：

Yuan, Jibing;Tang, Shiqing;Wang, Xinwen*;Zhang, Dengyu

通讯作者：

Wang, Xinwen

作者机构：

[Wang, Xinwen; Yuan, Jibing; Zhang, Dengyu; Tang, Shiqing] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.

[Wang, Xinwen; Yuan, Jibing; Zhang, Dengyu; Tang, Shiqing] Hengyang Normal Univ, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.

[Wang, Xinwen] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China.

通讯机构：

[Wang, Xinwen] H

Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.

Hengyang Normal Univ, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421002, Peoples R China.

Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China.

语种：

英文

关键词：

One-step distillation;GHZ-type states;Local unitary equivalence;X states

期刊：

QUANTUM INFORMATION PROCESSING

ISSN：

1570-0755

年：

2018

卷：

期：

页码：

1-12

DOI：

10.1007/s11128-018-2034-3

基金类别：

NSFCNational Natural Science Foundation of China (NSFC) [11647129]; Scientific Research Fund of Hunan Provincial Education DepartmentHunan Provincial Education Department [15A028, 16B036]; HNNSF [2016JJ2009, 2017JJ3005]; Science and Technology Plan Project of Hunan Province [2016TP1020]; Hunan Provincial Key Laboratory of Intelligent Information Processing and Application for Hengyang Normal University [IIPA18K07]; 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：

Entanglement distillation plays a very important role in quantum information science. Distillation of high-purity Greenberger–Horne–Zeilinger (GHZ) states has been widely studied. We here show that a pure GHZ-type entangled state or its local unitary (LU)-equivalent state could be extracted from two copies of a particular multipartite mixed state (e.g., an X state) in a single step. Such one-step distillation schemes for LU-equivalent states are expected to shed light on mixed-state manipulation and purification, as well as es...

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One-step distillation of local-unitary-equivalent GHZ-type states

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