Photon storage in Lambda-type optically dense atomic media. I. Cavity model

Details Photon storage in Lambda-type optically dense atomic media. I. Cavity model Photon storage in Lambda-type optically dense atomic media. I. Cavity model

2006-12-11

arxiv.org/abs/quant-ph/0612082v2

Phys. Rev. A 76, 033804 (2007)

Physics

Quantum Physics

16 pages, 2 figures. V2: significant changes in presentation, new references, higher resolution of figures

Scientific paper

10.1103/PhysRevA.76.033804

In a recent paper [Gorshkov et al., Phys. Rev. Lett. 98, 123601 (2007)], we used a universal physical picture to optimize and demonstrate equivalence between a wide range of techniques for storage and retrieval of photon wave packets in Lambda-type atomic media in free space, including the adiabatic reduction of the photon group velocity, pulse-propagation control via off-resonant Raman techniques, and photon-echo-based techniques. In the present paper, we perform the same analysis for the cavity model. In particular, we show that the retrieval efficiency is equal to C/(1+C) independent of the retrieval technique, where C is the cooperativity parameter. We also derive the optimal strategy for storage and, in particular, demonstrate that at any detuning one can store, with the optimal efficiency of C/(1+C), any smooth input mode satisfying T C gamma >> 1 and a certain class of resonant input modes satisfying T C gamma ~ 1, where T is the duration of the input mode and 2 gamma is the transition linewidth. In the two subsequent papers of the series, we present the full analysis of the free-space model and discuss the effects of inhomogeneous broadening on photon storage.

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