A simple scheme for implementing four-atom quantum dense coding in cavity QED

doi:10.1088/1674-1056/19/1/010309

Abstract An experimentally feasible scheme for implementing four-atom quantum dense coding of an atom--cavity system is proposed. The cavity is only virtually excited and no quantum information will be transferred from the atoms to the cavity. Thus the scheme is insensitive to cavity decay and the thermal field. In the scheme, Alice can send faithfully 4 bits of classical information to Bob by sending two qubits. Generalized Bell states can be exactly distinguished by detecting the atomic state, and quantum dense coding can be realized in a simple way.

Keywords: cavity quantum electrodynamics(QED) quantum dense coding

Received: 28 April 2009
Revised: 30 June 2009
Accepted manuscript online:

PACS:	42.50.Pq	(Cavity quantum electrodynamics; micromasers)
	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.Lx	(Quantum computation architectures and implementations)
	03.67.Mn	(Entanglement measures, witnesses, and other characterizations)
	42.50.Dv	(Quantum state engineering and measurements)

Fund: Project supported by the Postdoctal Foundation of Central South University of China, the Important Program of Hunan Provincial Education Department (Grant No. 06A038), Department of Education of Hunan Province of China (Grant No. 06C080), and Hunan Provincial Natural Science Foundation, China (Grant No. 07JJ3013).

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Zheng Xiao-Juan(郑小娟), Xu Hui(徐慧), Fang Mao-Fa(方卯发), and Zhu Kai-Cheng(朱开成) A simple scheme for implementing four-atom quantum dense coding in cavity QED 2010 Chin. Phys. B 19 010309

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