Anomalous Transport in the Superfluid Fluctuation Regime

Shun Uchino, Masahito Ueda

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23 Citations (Scopus)


Motivated by a recent experiment in ultracold atoms [S. Krinner et al., Proc. Natl. Acad. Sci. U.S.A. 113, 8144 (2016)PNASA60027-842410.1073/pnas.1601812113], we analyze transport of attractively interacting fermions through a one-dimensional wire near the superfluid transition. We show that in a ballistic regime where the conductance is quantized in the absence of interaction, the conductance is renormalized by superfluid fluctuations in reservoirs. In particular, the particle conductance is strongly enhanced, and the conductance plateau is blurred by emergent bosonic pair transport. For spin transport, in addition to the contact resistance, the wire itself is resistive, leading to a suppression of the measured spin conductance. Our results are qualitatively consistent with the experimental observations.

Original languageEnglish
Article number105303
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 2017 Mar 8
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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