Decoherence-free quantum memory for photonic state using atomic ensembles

Details Decoherence-free quantum memory for photonic state using atomic ensembles Decoherence-free quantum memory for photonic state using atomic ensembles

2008-11-04

arxiv.org/abs/0811.0418v1

Physics

Quantum Physics

6 pages, 4 figures

Scientific paper

Large scale quantum information processing requires stable and long-lived quantum memories. Here, using atom-photon entanglement, we propose an experimentally feasible scheme to realize decoherence-free quantum memory with atomic ensembles, and show one of its applications, remote transfer of unknown quantum state, based on laser manipulation of atomic ensembles, photonic state operation through optical elements, and single-photon detection with moderate efficiency. The scheme, with inherent fault-tolerance to the practical noise and imperfections, allows one to retrieve the information in the memory for further quantum information processing within the reach of current technology.

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