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Physical Review A

Phase-dependent spontaneous spin polarization and bifurcation delay in coupled two-component Bose-Einstein condensates (6 pages)

Long Shi, Chaohong Lee, Kaige Gao, Wenhua Hai

Published Jan 1, 2004• 0 citations
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Phase separation and dynamics of two-component Bose-Einstein condensates

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•Jul 11, 2016•0 citations
The spontaneous spin polarization and bifurcation delay in two-component Bose-Einstein condensates coupled with laser or∕and radio-frequency pulses are investigated. We find that the bifurcation and the spontaneous spin polarization are determined by both physical parameters and relative phase between two condensates. Through bifurcations, the system enters into the spontaneous spin polarization regime from the Rabi regime. We also find that bifurcation delay appears when the parameter is swept through a static bifurcation point. This bifurcation delay is responsible for metastability leading to hysteresis.
The spontaneous spin polarization and bifurcation delay in two-component Bose-Einstein condensates coupled with Raman pulses are investigated. We find that the bifurcation and the spontaneous spin polarization depend not only on the system parameters, but also on the relative phase between two components. Through bifurcations, the system enters into the spontaneous spin polarization regime from the Rabi regime. We also find that bifurcation delay appears when the parameter is swept through the static bifurcation point. This bifurcation delay is responsible for metastability leading to hysteresis. The area enclosed in the hysteresis loop increases with the sweeping rate of the parameter.