Holographic Storage of Biphoton Entanglement

Details Holographic Storage of Biphoton Entanglement Holographic Storage of Biphoton Entanglement

2012-04-06

arxiv.org/abs/1204.1532v1

Physics

Quantum Physics

5 pages, 4 figures, accepted by Phys. Rev. Lett

Scientific paper

Coherent and reversible storage of multi-photon entanglement with a multimode quantum memory is essential for scalable all-optical quantum information processing. Although single photon has been successfully stored in different quantum systems, storage of multi-photon entanglement remains challenging because of the critical requirement for coherent control of photonic entanglement source, multimode quantum memory, and quantum interface between them. Here we demonstrate a coherent and reversible storage of biphoton Bell-type entanglement with a holographic multimode atomic-ensemble-based quantum memory. The retrieved biphoton entanglement violates Bell's inequality for 1 microsecond storage time and a memory-process fidelity of 98% is demonstrated by quantum state tomography.

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