Continuous Variable Entanglement Distribution for Long-Distance Quantum Communication

doi:10.1088/0256-307X/30/6/060302

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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