A model of the absorption-induced nonlinear response of an atomic Bose-Einstein condensate driven by a weak resonant laser beam is presented. The model takes into account the slow BEC decay due to spontaneous emission and magnetic-trap loss by binary collisions, as well as compensation of the decay by injection of ground-state atoms into the trap. It is shown that the nonlinear response is much stronger than in other nonlinear optical media. For a BEC interferometer driven by a monochromatic beam, the threshold intensity for hysteretic switching is found, and dissipative spatial solitons are demonstrated.
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Original Russian Text © N.N. Rosanov, V.A. Smirnov, S.V. Fedorov, 2006, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2006, Vol. 129, No. 5, pp. 803–807.
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Rosanov, N.N., Smirnov, V.A. & Fedorov, S.V. Absorption-induced optical bistability and dissipative solitons in a BEC interferometer. J. Exp. Theor. Phys. 102, 703–706 (2006). https://doi.org/10.1134/S1063776106050013