Optical quantum memory

Details Optical quantum memory Optical quantum memory

2010-02-24

arxiv.org/abs/1002.4659v3

Nature Photonics 3, 706 - 714 (2009)

Physics

Quantum Physics

This is the original version of the review paper published in Nature Photonics. The review reflects the state of the art in th

Scientific paper

Quantum memory is important to quantum information processing in many ways: a synchronization device to match various processes within a quantum computer, an identity quantum gate that leaves any state unchanged, and a tool to convert heralded photons to photons-on-demand. In addition to quantum computing, quantum memory would be instrumental for the implementation of long-distance quantum communication using quantum repeaters. The importance of this basic quantum gate is exemplified by the multitude of optical quantum memory mechanisms being studied: optical delay lines, cavities, electromagnetically-induced transparency, photon-echo, and off-resonant Faraday interaction. Here we report on the state-of-the-art in the field of optical quantum memory, including criteria for successful quantum memory and current performance levels.

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