Bistable behavior of a two-mode Bose-Einstein condensate in an optical cavity
Date
2013-01-11Source Title
Laser physics
Print ISSN
1054-660X
Electronic ISSN
1555-6611
Publisher
IOP Institute of Physics Publishing
Volume
23
Issue
3
Pages
035501-1 - 035501-6
Language
English
Type
ArticleItem Usage Stats
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Abstract
We consider a two-component Bose-Einstein condensate in a one-dimensional optical cavity. Specifically, the condensate atoms are taken to be in two degenerate modes due to their internal hyperfine spin degrees of freedom and they are coupled to the cavity field and an external transverse laser field in a Raman scheme. A parallel laser also excites the cavity mode. When the pump laser is far detuned from its resonance atomic transition frequency, an effective nonlinear optical model of the cavity-condensate system is developed under the discrete mode approximation (DMA), while matter-field coupling has been considered beyond the rotating wave approximation. By analytical and numerical solutions of the nonlinear dynamical equations, we examine the mean cavity field and population difference (magnetization) of the condensate modes. The stationary solutions of both the mean cavity field and normalized magnetization demonstrate bistable behavior under certain conditions for the laser pump intensity and matter-field coupling strength.