Driving the slow-light soliton by controlling laser field

Details Driving the slow-light soliton by controlling laser field Driving the slow-light soliton by controlling laser field

2004-12-14

arxiv.org/abs/quant-ph/0412111v1

Physics

Quantum Physics

9 pages, 1 figure

Scientific paper

In the framework of the nonlinear $\Lambda$-model we investigate propagation of a slow-light soliton in atomic vapors and Bose-Einstein condensates. The velocity of the slow-light soliton is controlled by a time-dependent background field created by a controlling laser. For a fairly arbitrary time dependence of the field we find the dynamics of the slow-light soliton inside the medium. We provide an analytical description for the nonlinear dependence of the velocity of the signal on the controlling field. If the background field is turned off at some moment of time, the signal stops. We find the location and shape of the spatially localized memory bit imprinted into the medium. We show that the process of writing optical information can be described in terms of scattering data for the underlying scattering problem.

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