Reversible quantum interface for tunable single-sideband modulation.
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.
Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure, CNRS, 4 place Jussieu, F75252 Paris Cedex 05, France.
J
J
Cviklinski
J
J
Ortalo
J
J
Laurat
A
A
Bramati
M
M
Pinard
E
E
Giacobino