High-Fidelity Polarization Storage in a Gigahertz Bandwidth Quantum Memory
| Autor: | England, D. G., Michelberger, P. S., Champion, T. F. M., Reim, K. F., Lee, K. C., Sprague, M. R., Jin, X. -M., Langford, N. K., Kolthammer, W. S., Nunn, J., Walmsley, I. A. |
|---|---|
| Rok vydání: | 2011 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0953-4075/45/12/124008 |
| Popis: | We demonstrate a dual-rail optical Raman memory inside a polarization interferometer; this enables us to store polarization-encoded information at GHz bandwidths in a room-temperature atomic ensemble. By performing full process tomography on the system we measure up to 97\pm1% process fidelity for the storage and retrieval process. At longer storage times, the process fidelity remains high, despite a loss of efficiency. The fidelity is 86\pm4% for 1.5 \mu s storage time, which is 5,000 times the pulse duration. Hence high fidelity is combined with a large time-bandwidth product. This high performance, with an experimentally simple setup, demonstrates the suitability of the Raman memory for integration into large-scale quantum networks. Comment: 10 pages, 4 figures. Accepted for publication in Journal of Physics B |
| Databáze: | arXiv |
| Externí odkaz: |
|