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Thermoelectricity in a junction between interacting cold atomic Fermi gases
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 3696578
Author(s) Sekera, Tibor; Bruder, Christoph; Belzig, Wolfgang
Author(s) at UniBasel Bruder, Christoph
Sekera, Tibor
Year 2016
Title Thermoelectricity in a junction between interacting cold atomic Fermi gases
Journal Phys. Rev. A
Volume 94
Number 3
Pages / Article-Number 6 pp.
Abstract A gas of interacting ultracold fermions can be tuned into a strongly interacting regime using a Feshbach resonance. Here, we theoretically study quasiparticle transport in a system of two reservoirs of interacting ultracold fermions on the BCS side of the BCS-BEC crossover coupled weakly via a tunnel junction. Using the generalized BCS theory, we calculate the time evolution of the system that is assumed to be initially prepared in a nonequilibrium state characterized by a particle number imbalance or a temperature imbalance. A number of characteristic features like sharp peaks in quasiparticle currents or transitions between the normal and superconducting states are found. We discuss signatures of the Seebeck and the Peltier effects and the resulting temperature difference of the two reservoirs as a function of the interaction parameter (k(F)a)(-1). The Peltier effect may lead to an additional cooling mechanism for ultracold fermionic atoms.
Publisher American Physical Society
ISSN/ISBN 2469-9926 ; 2469-9934
edoc-URL http://edoc.unibas.ch/52047/
Full Text on edoc No
Digital Object Identifier DOI 10.1103/PhysRevA.94.033618
ISI-Number 000383137900012
Document type (ISI) Journal Paper
 
   

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