Atomic N00N state generation in distant cavities by virtual excitations

doi:10.1088/1674-1056/20/6/060302

Abstract A general scheme of generating N00N states of virtually-excited 2N atoms is proposed. The two cavities are fibre-connected with N atoms in each cavity. Although we focus on the case of N=2, the system can be extended to a few atoms with N>2. It is found that all 2N atoms can be entangled in the form of N00N states if the atoms in the first cavity are initially in the excited states and atoms in the second cavity are all in the ground states. The feasibility of the scheme is carefully discussed, it shows that the N00N state with a few atoms can be generated with good fidelity and the scheme is feasible in experiment.

Keywords: N00N states optical cavity optical fibre virtual excitations

Received: 26 October 2010
Revised: 06 January 2011
Accepted manuscript online:

PACS:	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.Mn	(Entanglement measures, witnesses, and other characterizations)

Fund: Project supported in part by the National Natural Science Foundation of China (Grant Nos. 10974125 and 60821004), the State Basic Key Research Program of China (Grant No. 2006CB921102), and the Science Foundation of the Educational Committee of Fujian Province, China (Grant No. JA09041).

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Yang Rong-Can (杨榕灿), Li Gang (李刚), Li Jie (李杰), Zhang Tian-Cai (张天才) Atomic N00N state generation in distant cavities by virtual excitations 2011 Chin. Phys. B 20 060302

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