Thermoelectricity in a junction between interacting cold atomic Fermi gases

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SEKERA, Tibor, Christoph BRUDER, Wolfgang BELZIG, 2016. Thermoelectricity in a junction between interacting cold atomic Fermi gases. In: Physical Review A. 94(3), 033618. ISSN 2469-9926. eISSN 2469-9934

@article{Sekera2016-07-14T17:05:39ZTherm-35651, title={Thermoelectricity in a junction between interacting cold atomic Fermi gases}, year={2016}, doi={10.1103/PhysRevA.94.033618}, number={3}, volume={94}, issn={2469-9926}, journal={Physical Review A}, author={Sekera, Tibor and Bruder, Christoph and Belzig, Wolfgang}, note={Article Number: 033618} }

eng Belzig, Wolfgang Thermoelectricity in a junction between interacting cold atomic Fermi gases 2016-07-14T17:05:39Z Sekera, Tibor Bruder, Christoph Bruder, Christoph 2016-10-17T08:13:53Z Belzig, Wolfgang 2016-10-17T08:13:53Z Sekera, Tibor 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<sub>F</sub>a)<sup>−1</sup>. The Peltier effect may lead to an additional cooling mechanism for ultracold fermionic atoms.

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