1. Strong-Coupling Effects on Quantum Transport in an Ultracold Fermi Gas.
- Author
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Furutani, Koichiro and Ohashi, Yoji
- Subjects
- *
ELECTRON gas , *TRANSPORTATION , *T-matrix - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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