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arxiv: 1207.4826 · v1 · pith:QAL7XKBInew · submitted 2012-07-19 · ❄️ cond-mat.quant-gas · cond-mat.supr-con

Pseudogap Effects of Fermi Gases in the Presence of A Strong Effective Magnetic Field

classification ❄️ cond-mat.quant-gas cond-mat.supr-con
keywords fieldeffectiveeffectsmagneticnormalpairspseudogapstate
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We address the important question of how to characterize the normal state of fermionic superfluids under the influence of a strong effective magnetic field, implemented through rapid rotation or novel artificial field techniques. We consider the effects of crossing from BCS to BEC and the role of non-condensed pairs, or pseudogap effects. Using a simple extension of Gor'kov theory we demonstrate how these pairs organize above the transition $T_c$ into precursors of a vortex configuration, which are associated with distortions of the ideal Abrikosov lattice. This non-uniform normal state appears to enable "Bose condensation" in a field which is otherwise problematic due to the effective one-dimensionality of Landau level dispersion.

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