Nematic Order by Disorder in Spin-2 BECs

Details Nematic Order by Disorder in Spin-2 BECs Nematic Order by Disorder in Spin-2 BECs

2007-02-05

arxiv.org/abs/cond-mat/0702057v2

Phys. Rev. Lett. 98, 190404 (2007)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures; 1 reference and 1 minor correction

Scientific paper

10.1103/PhysRevLett.98.190404

The effect of quantum and thermal fluctuations on the phase diagram of spin-2 BECs is examined. They are found to play an important role in the nematic part of the phase diagram, where a mean-field treatment of two-body interactions is unable to lift the accidental degeneracy between nematic states. Quantum and thermal fluctuations resolve this degeneracy, selecting the uniaxial nematic state, for scattering lengths $a_4>a_2$, and the square biaxial nematic state for $a_4

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