1203.6054 (Ville Pietilä)
Ville Pietilä
We theoretically study the normal phase properties of strongly interacting two-component Fermi gases in two spatial dimensions. In the limit of weak attraction, we find that even a balanced gas can be described in terms of effective polarons. As the attraction between fermions increases, we find a crossover from the gas of noninteracting polarons to a pseudogap phase. We investigate the signatures of this crossover in the radio-frequency (rf) spectroscopy. Our findings qualitatively explain the differences in the recent rf spectroscopy measurements of two-dimensional Fermi gases [Sommer et al., Phys. Rev. Lett. 108, 045302 (2012) and Zhang et al., arXiv:1201.3560].
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http://arxiv.org/abs/1203.6054
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