Memory for Light as a Quantum Process

Details Memory for Light as a Quantum Process Memory for Light as a Quantum Process

2008-12-21

arxiv.org/abs/0812.4053v1

Physical Review Letters 102, 203601 (2009)

Physics

Quantum Physics

Scientific paper

We report complete characterization of an optical memory based on electromagnetically induced transparency. We recover the superoperator associated with the memory, under two different working conditions, by means of a quantum process tomography technique that involves storage of coherent states and their characterization upon retrieval. In this way, we can predict the quantum state retrieved from the memory for any input, for example, the squeezed vacuum or the Fock state. We employ the acquired superoperator to verify the nonclassicality benchmark for the storage of a Gaussian distributed set of coherent states.

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