Scalable quantum information processing with atomic ensembles and flying photons

Details Scalable quantum information processing with atomic ensembles and flying photons Scalable quantum information processing with atomic ensembles and flying photons

2009-10-04

arxiv.org/abs/0910.0585v1

Physics

Quantum Physics

8 pages, 7 figures

Scientific paper

We present a scheme for scalable quantum information processing (QIP) with atomic ensembles and flying photons. Using the Rydberg blockade, we encode the qubits in the collective atomic states, which could be manipulated fast and easily due to the enhanced interaction, in comparison to the single-atom case. We demonstrate that our proposed gating could be applied to generation of two-dimensional cluster states for measurement-based quantum computation. Moreover, the atomic ensembles also function as quantum repeaters useful for long distance quantum state transfer. We show the possibility of our scheme to work in bad cavity or in weak coupling regime, which could much relax the experimental requirement. The efficient coherent operations on the ensemble qubits enable our scheme to be switchable between quantum computation and quantum communication using atomic ensembles.

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