Chin. Phys. Lett.  2013, Vol. 30 Issue (6): 060302    DOI: 10.1088/0256-307X/30/6/060302
GENERAL |
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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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.
Received: 05 February 2013      Published: 31 May 2013
PACS:  03.67.Bg (Entanglement production and manipulation)  
  03.67.Hk (Quantum communication)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/30/6/060302       OR      https://cpl.iphy.ac.cn/Y2013/V30/I6/060302
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ZHAO Jun-Jun
GUO Xiao-Min
WANG Xu-Yang
WANG Ning
LI Yong-Min
PENG Kun-Chi
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