Coreless vortex ground state of the rotating spinor condensate

Details Coreless vortex ground state of the rotating spinor condensate Coreless vortex ground state of the rotating spinor condensate

2002-08-05

arxiv.org/abs/cond-mat/0208078v2

Phys. Rev A 66, 053604 (2002)

Physics

Condensed Matter

Soft Condensed Matter

v2: Numerical parameters for trapping frequency in z-direction and for the particle number changed. Two new citations added ([

Scientific paper

10.1103/PhysRevA.66.053604

We study the ground state of the rotating spinor condensate and show that for slow rotation the ground state of the ferromagnetic spinor condensate is a coreless vortex. While coreless vortex is not topologically stable, we show that there is an energetic threshold for the creation of a coreless vortex. This threshold corresponds to a critical rotation frequency that vanishes as the system size increases. Also, we demonstrate the dramatically different behavior of the spinor condensate with anti-ferromagnetic interactions. For anti-ferromagnetic spinor condensate the angular momentum as a function of rotation frequency exhibits the familiar staircase behavior, but in contrast to an ordinary condensate the first step is to the state with angular momentum 1/2 per particle.

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