Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/104865
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Type: Journal article
Title: Dual-rail optical gradient echo memory
Author: Higginbottom, D.
Geng, J.
Campbell, G.
Hosseini, M.
Cao, M.
Sparkes, B.
Bernu, J.
Robins, N.
Lam, P.
Buchler, B.
Citation: Optics Express, 2015; 23(19):24937-24944
Publisher: The Optical Society
Issue Date: 2015
ISSN: 1094-4087
1094-4087
Statement of
Responsibility: 
D. B. Higginbottom, J. Geng, G. T. Campbell, M. Hosseini, M. T. Cao, B. M. Sparkes, J. Bernu, N. P. Robins, P. K. Lam and B. C. Buchler
Abstract: We introduce a scheme for the parallel storage of frequency separated signals in an optical memory and demonstrate that this dual-rail storage is a suitable memory for high fidelity frequency qubits. The two signals are stored simultaneously in the Zeeman-split Raman absorption lines of a cold atom ensemble using gradient echo memory techniques. Analysis of the split-Zeeman storage shows that the memory can be configured to preserve the relative amplitude and phase of the frequency separated signals. In an experimental demonstration dual-frequency pulses are recalled with 35% efficiency, 82% interference fringe visibility, and 6° phase stability. The fidelity of the frequency-qubit memory is limited by frequency-dependent polarisation rotation and ambient magnetic field fluctuations, our analysis describes how these can be addressed in an alternative configuration.
Rights: © 2015 Optical Society of America
RMID: 0030068498
DOI: 10.1364/OE.23.024937
Grant ID: http://purl.org/au-research/grants/arc/CE1101027
Appears in Collections:Physics publications

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