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Published on: November 11, 2013
Quantum Storage of Single-Photon and Two-Photon Fock States with an All-Optical Quantum Memory
M Bouillard1, G Boucher1, J Ferrer Ortas1
1Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 2 Avenue Augustin Fresnel, 91127, Palaiseau, France.
Abstract:
Quantum memories are a crucial element toward efficient quantum protocols. In the continuous variables domain, such memories need to provide high fidelity with an efficiency set to one. Moreover, one needs to store complex quantum states exhibiting negative Wigner functions after storage. We report the storage of single- and two-photon Fock states in an all-optical quantum memory. The Wigner functions of these states show negativity after a storage time of several hundred nanoseconds. This is, to our knowledge, the first demonstration of the storage in the optical domain of non-Gaussian states with more than one photon, captured from an external source and characterized with homodyne detection.
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