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Remote Atom Entanglement

David L. Moehring, M. J. Madsen, B. B. Blinov +2 more

Bulletin of the American Physical SocietyMay 19, 20050 citations

Remote Generation of Entanglement for Individual Atoms via Optical Fibres

Yanqing Guo, Zhong Hai-yang, Yinghui Zhang +1 more

The generation of atomic entanglement is discussed in a system that atoms are trapped in separate cavities which are connected via optical fibres. Two distant atoms can be projected to Bell-state by synchronized turning off of the local laser fields and then performing a single quantum measurement by a distant controller. The distinct advantage of this scheme is that it works in a regime where Δ ≈ κ ≫ g, which makes the scheme insensitive to cavity strong leakage. Moreover, the fidelity is not affected by atomic spontaneous emission.The generation of atomic entanglement is discussed in a system that atoms are trapped in separate cavities which are connected via optical fibres. Two distant atoms can be projected to Bell-state by synchronized turning off of the local laser fields and then performing a single quantum measurement by a distant controller. The distinct advantage of this scheme is that it works in a regime where Δ ≈ κ ≫ g, which makes the scheme insensitive to cavity strong leakage. Moreover, the fidelity is not affected by atomic spontaneous emission.

arXiv:0805.4493Chinese Physics LettersJul 1, 20083 citations

Multi-Atom Entanglement Engineering in Distant Cavities via Resonant Interaction

钟志荣

我们建议为为在三个远洞套住的多重原子的纠缠的状态的产生的一个计划由二相同单个模式的纤维连接了。与以前的计划相比，建议计划的明显的优点是：首先，在建议协议的所有洞能自由地与对方一起交往，它在量通讯和分布式的量计算是重要的。第二，在计划，原子，洞，和纤维，模式在回声。因此，要求的相互作用时间是短的，鉴于 decoherence，它是重要的。原则上，建议计划能被扩大产生 n 原子纠缠的状态。[从作者抽象]我们建议为为在三个远洞套住的多重原子的纠缠的状态的产生的一个计划由二相同单个模式的纤维连接了。与以前的计划相比，建议计划的明显的优点是：首先，在建议协议的所有洞能自由地与对方一起交往，它在量通讯和分布式的量计算是重要的。第二，在计划，原子，洞，和纤维，模式在回声。因此，要求的相互作用时间是短的，鉴于 decoherence，它是重要的。原则上，建议计划能被扩大产生 n 原子纠缠的状态。[从作者抽象]

Chinese Physics LettersJan 1, 20100 citations

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

Xin‐You Lü, Liu-Gang Si, Meng Wang +2 more

Based on the dispersive atom–field interaction, a scheme is proposed for deterministically generating entanglement between two Λ-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.Based on the dispersive atom–field interaction, a scheme is proposed for deterministically generating entanglement between two Λ-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.

Journal of Physics B Atomic Molecular and Optical PhysicsNov 19, 200816 citations

Generation of entanglement of multiple atoms via distant cavities

Zhi‐Rong Zhong

Optics CommunicationsJan 6, 201010 citations

Generation of W n state with three atoms trapped in two remote cavities coupled by an optical fibre

Yan‐Ling Li, Mao-Fa Fang

We propose two schemes for the generation of the Wn state with three atoms separately trapped in two distant cavities coupled by an optical fibre. One is implemented by controlling the interaction time, the other is implemented via the adiabatic passage. The influence of various decoherence processes, such as spontaneous emission of the atoms and photon leakages of the cavities and the optical fibre, on the fidelity is also investigated. It is found that the Wn state can be generated with high fidelity even when these decoherence processes are present.We propose two schemes for the generation of the Wn state with three atoms separately trapped in two distant cavities coupled by an optical fibre. One is implemented by controlling the interaction time, the other is implemented via the adiabatic passage. The influence of various decoherence processes, such as spontaneous emission of the atoms and photon leakages of the cavities and the optical fibre, on the fidelity is also investigated. It is found that the Wn state can be generated with high fidelity even when these decoherence processes are present.

Chinese Physics BMay 1, 20114 citations

Remote Generation of Entanglement for Individual Atoms via Optical Fibres

Abstract

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Remote Generation of Entanglement for Individual Atoms via Optical Fibres

Abstract

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