Abstract
We theoretically investigate quantum conductance across a point contact between two strongly-interacting ultracold Fermi gases. We evaluate the tunneling current, taking into account pairing fluctuations in the Fermi gases within the framework of a combined strong-coupling T-matrix approximation with the Schwinger-Keldysh non-equilibrium formalism. We show that quasi-particle conductance is gradually suppressed, as one passes through the BCS–BEC crossover region from the weak-coupling side. On the other hand, with increasing the strength of a pairing interaction, the fluctuation-pair conductance is found to remarkably increase in the crossover region, which is followed by the suppression in the strong-coupling regime.
Original language | English |
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Pages (from-to) | 49-57 |
Number of pages | 9 |
Journal | Journal of Low Temperature Physics |
Volume | 201 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2020 Oct 1 |
Keywords
- BCS–BEC crossover
- Pairing fluctuations
- Quantum transport
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics