Quantum entanglement distribution with hybrid parity gate

Abstract

We propose a scheme for entanglement distribution among different single atoms trapped in separated cavities. In our scheme, by reflecting an input coherent optical pulse from a cavity with a single trapped atom, a controlled phase-shift gate between the atom and the coherent optical pulse is achieved. Based on this gate and homodyne detection, we construct an $n$-qubit parity gate and show its use for distribution of a large class of entangled states in one shot, including the GHZ state $|GH{Z}_n⟩$, W state $|W_n⟩$, Dicke state $|D_{n,k}⟩$ and certain sums of Dicke states . We also show such distribution could be performed with high success probability and high fidelity even in the presence of channel loss.

8 pages, 6 figures

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Cited by in corpus (1)

• Atomic entanglement purification using photonic Faraday rotation