@article{53cd759a00994eec9f2c293c516bc0e4,
title = "Superfluid density and critical velocity near the Berezinskii-Kosterlitz-Thouless transition in a two-dimensional strongly interacting Fermi gas",
abstract = "We theoretically investigate superfluidity in a strongly interacting Fermi gas confined to two dimensions at finite temperature. Using a Gaussian pair fluctuation theory in the superfluid phase, we calculate the superfluid density and determine the critical temperature and chemical potential at the Berezinskii-Kosterlitz-Thouless transition. We propose that the transition can be unambiguously demonstrated in cold-atom experiments by stirring the superfluid Fermi gas using a red-detuned laser beam, to identify the characteristic jump in the local Landau critical velocity at the superfluid-normal interface, as the laser beam moves across the cloud.",
author = "Mulkerin, {Brendan C.} and Lianyi He and Paul Dyke and Vale, {Chris J.} and Liu, {Xia Ji} and Hui Hu",
note = "Funding Information: We are grateful to Joaqu{\'i}n Drut for sharing the QMC results in Ref. [47] and to Yvan Castin and Gora Shlyapnikov for stimulating discussions on the sudden jump in the critical velocity. This research was supported under Australian Research Council (ARC) Discovery Projects funding scheme (Projects No. DP140100637 and No. DP140103231) and ARC Future Fellowships funding scheme (Projects No. FT130100815 and No. FT140100003). L.H. was supported by the Thousand Young Talents program in China. X.J.L. was supported in part by the National Science Foundation under Grant No. NSF PHY-1125915, during her visit to KITP. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = nov,
day = "6",
doi = "10.1103/PhysRevA.96.053608",
language = "English",
volume = "96",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "5",
}