Absorption optical bistability and dissipative solitons in interferometer containing Bose-Einstein condensate

One evaluated the adsorption nonlinearity of the Bose-Einstein atomic condensate when it was slightly resonance-excited by laser radiation. In this case, one takes account of slow decay under effect of spontaneous radiation of excited atoms and pair collisions releasing atoms from a magnetic trap, and one takes accounts, as well, of decay compensating pumping by injection of low state atoms into a trap. The value of nonlinearity is shown to be essentially higher than the known value for other nonlinear-and-optical media. For an interferometer containing the mentioned condensate and excited by external monochromatic radiation one evaluated the intensity of low-threshold hysteretic switchings and demonstrated dissipative spatial solitons