open system; cold atoms; quantum transport; Andreev reflection
Abstract :
[en] We show how Cooper-pair-assisted transport, which describes the stimulated transport of electrons in the presence of Cooper-pairs, can be engineered and controlled with cold atoms, in regimes that are difficult to access for condensed matter systems. Our model is a channel connecting two cold atomic gases, and the mechanism to generate such a transport relies on the coupling of the channel to a molecular BEC, with diatomic molecules of fermionic atoms. Our results are obtained using a Floquet─Redfield master equation that accounts for an exact treatment of the interaction between atoms in the channel. We explore, in particular, the impact of the coupling to the BEC and the interaction between atoms in the junction on its transport properties, revealing non-trivial dependence of the produced particle current. We also study the effects of finite temperatures of the reservoirs and the robustness of the current against additional dissipation acting on the junction. Our work is experimentally relevant and has potential applications to dissipation engineering of transport with cold atoms, studies of thermoelectric effects, quantum heat engines, or Floquet Majorana fermions.
Disciplines :
Physics
Author, co-author :
Damanet, François ; Department of Physics and SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom
Mascarenhas, Eduardo; Department of Physics and SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom
Pekker, David; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, United States of America ; Pittsburgh Quantum Institute, Pittsburgh, PA 15260, United States of America
Daley, Andrew J.; Department of Physics and SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom)
Language :
English
Title :
Reservoir engineering of Cooper-pair-assisted transport with cold atoms
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