Cyclic phase in F=2 spinor condensate: Long-range order, kinks, and roughening transition

Details Cyclic phase in F=2 spinor condensate: Long-range order, kinks, and roughening transition Cyclic phase in F=2 spinor condensate: Long-range order, kinks, and roughening transition

2006-04-21

arxiv.org/abs/cond-mat/0604505v2

Phys. Rev. A 74, 023611 (2006).

Physics

Condensed Matter

Statistical Mechanics

6 pages, 1 figure; final version, accepted for publication in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.74.023611

We study the effect of thermal fluctuations on homogeneous infinite Bose-Einstein condensate with spin F=2 in the cyclic state, when atoms occupy three hyperfine states with $m_{F}=0, \pm 2$. We use both the approach of small-amplitude oscillations and mapping of our model on the sine-Gordon model. We show that thermal fluctuations lead to the existence of the rough phase in one- and two-dimensional systems, when presence of kinks is favorable. The structure and energy of a single kink are found. We also discuss the effect of thermal fluctuations on spin degrees of freedom in F=1 condensate.

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