Abstract
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 ± 1% 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 ± 4% for 1.5 μs storage time, which is 5000 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.
Original language | English |
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Article number | 124008 |
Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
Volume | 45 |
Issue number | 12 |
DOIs | |
Publication status | Published - 28 Jun 2012 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Atomic and Molecular Physics, and Optics