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Superfluidity and Magnetism in Multicomponent Ultracold Fermions

Cherng, R. W. and Refael, G. and Demler, E. (2007) Superfluidity and Magnetism in Multicomponent Ultracold Fermions. Physical Review Letters, 99 (13). Art. No. 130406. ISSN 0031-9007. doi:10.1103/PhysRevLett.99.130406.

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We study the interplay between superfluidity and magnetism in a multicomponent gas of ultracold fermions. Ward-Takahashi identities constrain possible mean-field states describing order parameters for both pairing and magnetization. The structure of global phase diagrams arises from competition among these states as functions of anisotropies in chemical potential, density, or interactions. They exhibit first and second order phase transition as well as multicritical points, metastability regions, and phase separation. We comment on experimental signatures in ultracold atoms.

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Additional Information:©2007 The American Physical Society. (Received 2 May 2007; published 28 September 2007) We acknowledge useful discussions with Walter Hofstetter. This work was supported by NSF grant No. DMR-0132874, Harvard-MIT CUA, AFOSR, and NDSEG.
Issue or Number:13
Record Number:CaltechAUTHORS:CHEprl07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8927
Deposited By: Archive Administrator
Deposited On:01 Oct 2007
Last Modified:08 Nov 2021 20:54

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