Nematic Order by Disorder in Spin-2 Bose-Einstein Condensates

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Nematic Order by Disorder in Spin-2 Bose-Einstein Condensates

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Title: Nematic Order by Disorder in Spin-2 Bose-Einstein Condensates
Author: Turner, Ari M.; Barnett, Ryan; Demler, Eugene A.; Vishwanath, Ashvin

Note: Order does not necessarily reflect citation order of authors.

Citation: Turner, Ari M., Ryan Barnett, Eugene Demler, and Ashvin Vishwanath. 2007. “Nematic Order by Disorder in Spin-2 Bose-Einstein Condensates.” Physical Review Letters 98 (19) (May 11). doi:10.1103/physrevlett.98.190404.
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Abstract: We show that quantum and thermal fluctuations in spin-2 Bose-Einstein condensates lift the accidental degeneracy of the mean-field phase diagram. Fluctuations select the uniaxial (square biaxial) nematic state for scattering lengths a4 > a2 (a4 < a2). Paradoxically, the order is stronger at higher temperatures. For spin-2 87Rb and 23Na, a continuous Ising-type transition is predicted on raising the magnetic field, from a fluctuation stabilized uniaxial state to a field stabilized square biaxial order state. This is a promising experimental system to realize the ‘‘order-by-disorder’’ phenomenon.
Published Version: doi:10.1103/PhysRevLett.98.190404
Other Sources: http://arxiv.org/abs/cond-mat/0702057
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:27891676
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