Date of this Version
Physical Review A (2003) 67: 053807. DOI: 10.1103/PhysRevA.67.053807. PACS numbers: 42.50.Gy, 03.67.2-a.
We have demonstrated the phase coherence of stored light in Rb vapor with a completely optical technique. Combining this technique with polarization measurements provides strong evidence that arbitrary polarizations can be stored. The fidelity obtained exceeds 95% for all polarizations. We view the capability to store polarizations as a first step towards building a quantum memory in such a system.