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Phys Rev Lett. 2008 Sep 26;101(13):133601. Epub 2008 Sep 26.

Reversible quantum interface for tunable single-sideband modulation.

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  • 1Laboratoire Kastler Brossel, Universit√© Pierre et Marie Curie, Ecole Normale Sup√©rieure, CNRS, 4 place Jussieu, F75252 Paris Cedex 05, France.


Using electromagnetically induced transparency in a cesium vapor, we demonstrate experimentally that the quantum state of a light beam can be mapped into the long-lived Zeeman coherences of an atomic ground state. Two noncommuting variables carried by light are simultaneously stored and subsequently read out, with no noise added. We compare the case where a tunable single sideband is stored independently of the other one to the case where the two symmetrical sidebands are stored using the same electromagnetically induced transparency window.

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