Research

High-fidelity polarization storage in a gigahertz bandwidth quantum memory


Reference:

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. and Walmsley, I. A., 2012. High-fidelity polarization storage in a gigahertz bandwidth quantum memory. Journal of Physics B: Atomic, Molecular and Optical Physics, 45 (12), 124008.

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Official URL:

https://doi.org/10.1088/0953-4075/45/12/124008

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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. © 2012 IOP Publishing Ltd.

Details

Item Type Articles
CreatorsEngland, 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. and Walmsley, I. A.
DOI10.1088/0953-4075/45/12/124008
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URLURL Type
http://www.scopus.com/inward/record.url?scp=84862225020&partnerID=8YFLogxKUNSPECIFIED
Uncontrolled Keywordscondensed matter physics,atomic and molecular physics, and optics
DepartmentsFaculty of Science > Physics
RefereedYes
StatusPublished
ID Code56153

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