Strong-Coupling Theory for a Non-equilibrium Unitary Fermi Gas

We study a non-equilibrium unitary Fermi gas, being coupled with two baths with different values of chemical potential. Extending a T -matrix approximation developed in equilibrium Fermi gases to the non-equilibrium steady state by using the Keldysh Green’s function technique, we examine the superfl...

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Bibliographic Details
Published in:Journal of low temperature physics 2020-10, Vol.201 (1-2), p.41-48
Main Authors: Kawamura, T., Kagamihara, D., Hanai, R., Ohashi, Y.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemical potential
Condensed Matter Physics
Fermi gases
Fluids
Low temperature physics
Magnetic Materials
Magnetism
Phase transitions
Physics
Physics and Astronomy
Superfluidity
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Summary:We study a non-equilibrium unitary Fermi gas, being coupled with two baths with different values of chemical potential. Extending a T -matrix approximation developed in equilibrium Fermi gases to the non-equilibrium steady state by using the Keldysh Green’s function technique, we examine the superfluid phase transition out of equilibrium. We also clarify non-equilibrium effects on the pseudogap phenomenon by strong pairing fluctuations.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-019-02310-7