Gaussification of quantum states of traveling light beams in atomic memory

Details Gaussification of quantum states of traveling light beams in atomic memory Gaussification of quantum states of traveling light beams in atomic memory

2010-09-24

arxiv.org/abs/1009.4808v1

Phys. Rev. A 82, 022334 (2010)

Physics

Quantum Physics

8 pages, 8 figures, REVTeX 4

Scientific paper

We propose and investigate a protocol for Gaussification of quantum states of traveling light beams in an atomic quantum memory that couples to light via quantum non-demolition interaction. The protocol relies on a periodic switching between two different QND couplings and the total coupling strength scales only logarithmically with number of Gaussified light modes. The present scheme can be used to prepare entangled states of two distant atomic ensembles and to purify and Gaussify noisy non-Gaussian entangled states of light while simultaneously storing the purified state in atomic memories.

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