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Classifying Novel Phases of Spinor Atoms

Barnett, Ryan and Turner, Ari and Demler, Eugene (2006) Classifying Novel Phases of Spinor Atoms. Physical Review Letters, 97 (18). Art. No. 180412. ISSN 0031-9007. doi:10.1103/PhysRevLett.97.180412.

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We consider many-body states of bosonic spinor atoms which, at the mean-field level, can be characterized by a single-particle wave function for the Bose-Einstein condensation and Mott insulating states. We describe and apply a classification scheme that makes explicit the spin symmetries of such states and enables one to naturally analyze their collective modes and topological excitations. Quite generally, the method allows classification of a spin F system as a polyhedron with 2F vertices. We apply the method to the many-body states of bosons with spins two and three. For spin-two atoms we find the ferromagnetic state, a continuum of nematic states, and a state having the symmetry of the point group of the regular tetrahedron. For spin-three atoms we obtain similar ferromagnetic and nematic phases as well as states having symmetries of various types of polyhedra with six vertices.

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Additional Information:©2006 The American Physical Society (Received 9 July 2006; published 3 November 2006) This work was supported by the NSF Grant No. DMR-0132874 and the Harvard-MIT CUA. We thank T.-L. Ho, A. Imambekov, A. Kolezhuk, M. Lewenstein, and S. Sachdev for useful discussions.
Issue or Number:18
Record Number:CaltechAUTHORS:BARprl06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6187
Deposited By: Archive Administrator
Deposited On:28 Nov 2006
Last Modified:08 Nov 2021 20:31

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