Generation of entanglement between two spatially separated atoms via dispersive atom-field interaction

作者:Lue Xin You; Si Liu Gang; Wang Meng; Zhang Su Zhen; Yang Xiaoxue
来源:Journal of Physics B: Atomic, Molecular and Optical Physics , 2008, 41(23): 235502.
DOI:10.1088/0953-4075/41/23/235502

摘要

Based on the dispersive atom-field interaction, a scheme is proposed for deterministically generating entanglement between two Lambda-type atoms, which are trapped individually in two spatially separated cavities coupled by an optical fibre. In the present scheme, it is found that the atomic spontaneous decay and photon leakage out of the fibre can be efficiently suppressed via choosing appropriately the frequency detuning of atom-field and the coupling intensity of cavity-fibre, respectively. The influence of photon leakage out of the cavities is also discussed, and the strictly numerical simulation shows that our proposal is good enough to demonstrate the generation of entanglement between two distant atoms with high fidelity.