Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tunneling transport of unitary fermions across the superfluid transition   We investigate the transport of a Fermi gas with unitarity-limited
interactions across the superfluid phase transition, probing its response to a
direct current (dc) drive through a tunnel junction. As the superfluid critical
temperature is crossed from below, we observe the evolution from a highly
nonlinear to an Ohmic conduction characteristics, associated with the critical
breakdown of the Josephson dc current induced by pair condensate depletion.
Moreover, we reveal a large and dominant anomalous contribution to resistive
currents, which reaches its maximum at the lowest attained temperature,
fostered by the tunnel coupling between the condensate and phononic
Bogoliubov-Anderson excitations. Increasing the temperature, while the zeroing
of supercurrents marks the transition to the normal phase, the conductance
drops considerably but remains much larger than that of a normal, uncorrelated
Fermi gas tunneling through the same junction. We attribute such enhanced
transport to incoherent tunneling of sound modes, which remain weakly damped in
the collisional hydrodynamic fluid of unpaired fermions at unitarity.

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The categories of this paper are: math
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs