Pairing and radio-frequency spectroscopy in two-dimensional Fermi gases
Abstract
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 the gas can be described in terms of effective polarons. As the attraction between fermions increases, we find a crossover from a gas of non-interacting polarons to a pseudogap regime. We investigate how this crossover is manifested 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., Phys. Rev. Lett. 108, 235302 (2012)].
Keywords
Cite
@article{arxiv.1203.6054,
title = {Pairing and radio-frequency spectroscopy in two-dimensional Fermi gases},
author = {Ville Pietilä},
journal= {arXiv preprint arXiv:1203.6054},
year = {2012}
}
Comments
11 pages, 9 figures; v2: slightly expanded, typos corrected; v3: published version