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.
Cviklinski
J
J
Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure, CNRS, 4 place Jussieu, F75252 Paris Cedex 05, France.
Ortalo
J
J
Laurat
J
J
Bramati
A
A
Pinard
M
M
Giacobino
E
E