Measurement of the concurrence of arbitrary two-photon six-qubit hyperentangled state

被引：8

作者：

Zhu, Sha ^{[1
,3
]}

Liu, Yu-Chen ^{[2
]}

Zhao, Bao-Kui ^{[2
]}

Zhou, Lan ^{[1
,4
]}

Zhong, Wei ^{[3
,4
]}

Sheng, Yu-Bo ^{[3
,4
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210003, Peoples R China

[2] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China

[3] Nanjing Univ Posts & Telecommun, Inst Quantum Informat & Technol, Nanjing 210003, Peoples R China

[4] Nanjing Univ Posts & Telecommun, Key Lab Broadband Wireless Commun & Sensor Networ, Minist Educ, Nanjing 210003, Peoples R China

来源：

EPL | 2020年 / 129卷 / 05期

基金：

中国国家自然科学基金;

关键词：

ENTANGLEMENT; SINGLE; PURIFICATION; SYSTEMS;

D O I：

10.1209/0295-5075/129/50004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Hyperentanglement is the quantum system entangled in several degrees of freedom (DOFs), which has attracted extensive attention in quantum communication. In the practical application of hyperentanglement, the key step is to know the information of the hyperentanglement. In this paper, we propose an efficient protocol to measure the concurrence of arbitrary two-photon six-qubit hyperentangled state, which simultaneously entangles in the polarization and double longitudinal momentum DOFs. This protocol requires the weak cross-Kerr nonlinearity and some linear optical elements to construct the quantum nondemolition detection gate. The concurrence in each DOF can be converted into the success probability of distilling some specified states. Our protocol may play an important role in future quantum information processing. Copyright (C) EPLA, 2020

引用

页数：7

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