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Single-plane-wave Larkin-Ovchinnikov-Fulde-Ferrell state in BCS--Bose-Einstein condensation crossover

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arxiv cond-mat/0610274 v2 pith:E5RF65RF submitted 2006-10-10 cond-mat.str-el cond-mat.quant-gascond-mat.supr-con

Single-plane-wave Larkin-Ovchinnikov-Fulde-Ferrell state in BCS--Bose-Einstein condensation crossover

classification cond-mat.str-el cond-mat.quant-gascond-mat.supr-con
keywords loffbcs--bose-einsteincondensationcrossoverlarkin-ovchinnikov-fulde-ferrellphasessingle-plane-wavestate
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the single-plane-wave Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) states for BCS--Bose-Einstein condensation (BEC) crossover at general temperatures $T$. Because we include the important effects of noncondensed pairs, our $T \neq 0$ phase diagrams are different from those reported in earlier work. We find that generalized LOFF phases may be the ground state for a wide range of (weak through moderately strong) interactions, including the unitary regime. However, these LOFF phases are readily destroyed by non-zero $T$.

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