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Title

Spin-wave storage using chirped control fields in atomic frequency comb-based quantum memory

Authors
Sangouard, Nicolas
Published in Physical Review. A. 2010, vol. 82, no. 4, p. 042309-1/6
Abstract It has been shown that an inhomogeneously broadened optical transition shaped into an atomic frequency comb can store a large number of temporal modes of the electromagnetic field at the single-photon level without the need to increase the optical depth of the storage material. The readout of light modes is made efficient thanks to the rephasing of the optical-wavelength coherence similar to photon-echo-type techniques, and the reemission time is given by the comb structure. For on-demand readout and long storage times, two control fields are used to transfer the optical coherence back and forth into a spin wave. Here, we present a detailed analysis of the spin-wave storage based on chirped adiabatic control fields. In particular, we verify that chirped fields require significantly weaker intensities than π pulses. The price to pay is a reduction of the multimode storage capacity that we quantify for realistic material parameters associated with solids doped with rare-earth-metal ions.
Stable URL http://archive-ouverte.unige.ch/unige:12221
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Other version: http://link.aps.org/doi/10.1103/PhysRevA.82.042309
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Deposited on : 2010-10-22

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