Light storing in a medium of atoms in the tripod configuration

Details Light storing in a medium of atoms in the tripod configuration Light storing in a medium of atoms in the tripod configuration

2005-02-07

arxiv.org/abs/quant-ph/0502039v1

Physics

Quantum Physics

8 pages, 5 figures

Scientific paper

Light propagation and storing in a medium of atoms in the tripod configuration driven by two control pulses are investigated theoretically in terms of two polaritons and numerically. It is shown that a magnetic field switched on at the pulse storage stage changes the phase relations between the atomic coherences due to the stored pulse, which leads to an essential modification of the released pulse. Quantitative relations concerning the released pulse and the coherences are given. A general situation when the two control fields are not proportional at the pulse release stage is also examined. It is shown that in both cases a single dark state polariton is not sufficient to account for the pulse evolution, which is connected with the fact that a part of the signal remains in the medium after the release stage.

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