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Continuous Variable Entanglement Distribution for Long-Distance Quantum Communication |
ZHAO Jun-Jun, GUO Xiao-Min, WANG Xu-Yang, WANG Ning, LI Yong-Min**, PENG Kun-Chi |
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006
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Cite this article: |
ZHAO Jun-Jun, GUO Xiao-Min, WANG Xu-Yang et al 2013 Chin. Phys. Lett. 30 060302 |
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Abstract We develop a frequency-tunable two-color continuous variable entangled state and demonstrate the entanglement distribution over a telecom single mode fiber. One beam of the entangled state (795 nm) can be continuously tuned over a range of 2.4 GHz and the hyperfine transitions of a rubidium D1 line are measured based on saturated absorption spectroscopy. The other beam (1560 nm) is injected into a 5-km single mode fiber to distribute the entanglement, and the entanglement evolution between the transmitted beam and its entangled counterpart is investigated. The system presented here will find potential applications in long-distance quantum information processing.
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Received: 05 February 2013
Published: 31 May 2013
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PACS: |
03.67.Bg
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(Entanglement production and manipulation)
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03.67.Hk
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(Quantum communication)
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