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Proceedings Paper

Gradient echo quantum memory for light using two-level atoms
Author(s): J. J. Longdell; G. Hétet; A. L. Alexander; P. K. Lam; M. J. Sellars
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Paper Abstract

Here we show that the photon echo equivalent of an NMR gradient echo is completely efficient if the sample is optically thick, the detunings of the atoms vary linearly along the direction of propagation and the storage time is short compared to the decay rate of the atoms. In this process the only light that interacts with the sample of atoms during the storage and retrieval process is the light that is to be stored and then retrieved, their are no auxiliary beams. The stored and recalled light travel in the same direction and their is no need for the phase matching operation that is present in previous quantum memory proposals using controlled inhomogeneous broadening. This greatly simplifies various possible implementations. We present analytical, numerical and experimental results of this scheme. We report experimental efficiencies of up to 15% and suggest simple realizable improvements to significantly increase the efficiency.

Paper Details

Date Published: 25 September 2007
PDF: 9 pages
Proc. SPIE 6710, Quantum Communications and Quantum Imaging V, 67100X (25 September 2007); doi: 10.1117/12.735471
Show Author Affiliations
J. J. Longdell, Univ. of Otago (New Zealand)
Australian National Univ. (Australia)
G. Hétet, Australian National Univ. (Australia)
A. L. Alexander, Australian National Univ. (Australia)
P. K. Lam, Australian National Univ. (Australia)
M. J. Sellars, Australian National Univ. (Australia)


Published in SPIE Proceedings Vol. 6710:
Quantum Communications and Quantum Imaging V
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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