期刊
OPTICS EXPRESS
卷 25, 期 3, 页码 2969-2982出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.25.002969
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资金
- Ministry of Science and Technology of the People's Republic of China (MOST) [2016YFA0301304]
- National Natural Science Foundation of China [11404031, 61671083, 61622103, 61471050]
- Open Research Fund Program of State Key Laboratory of Low-Dimensional Quantum Physics [KF201610]
- Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China
As the interaction between the photons and the environment which will make the entangled photon pairs in less entangled states or even in mixed states, the security and the efficiency of quantum communication will decrease. We present an efficient hyperentanglement purification protocol that distills nonlocal high-fidelity hyper-entangled Bell states in both polarization and spatial-mode degrees of freedom from ensembles of two-photon system in mixed states using linear optics. Here, we consider the influence of the photon loss in the channel which generally is ignored in the conventional entanglement purification and hyperentanglement purification (HEP) schemes. Compared with previous HEP schemes, our HEP scheme decreases the requirement for nonlocal resources by employing high-dimensional mode-check measurement, and leads to a higher fidelity, especially in the range where the conventional HEP schemes become invalid but our scheme still can work. (C) 2017 Optical Society of America
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