Controlling quantum transport via dissipation engineering

Francois Damanet, Eduardo Mascarenhas, David Pekker, Andrew Daley

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Inspired by the microscopic control over dissipative processes in quantum optics and cold atoms, we develop an open-system framework to study dissipative control of transport in strongly interacting fermionic systems, relevant for both solid state and cold atom experiments. We show how subgap currents exhibiting Multiple Andreev Reflections -- the stimulated transport of electrons in the presence of Cooper-pairs -- can be controlled via engineering of superconducting leads or superfluid atomic gases. Our approach incorporates dissipation within the channel, which is naturally occurring and can be engineered in cold gas experiments. This opens opportunities for engineering many phenomena with transport in strongly interacting systems. As examples, we consider particle loss and dephasing, and note different behaviour for currents with different microscopic origin. We also show how to induce nonreciprocal electron and Cooper-pair currents.
Original languageEnglish
Article number180402
Number of pages7
JournalPhysical Review Letters
Volume123
Issue number18
Early online date31 Oct 2019
DOIs
Publication statusPublished - 1 Nov 2019

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dissipation
engineering
cold gas
quantum optics
monatomic gases
atoms
electrons
solid state

Keywords

  • quantum optics
  • cold atoms
  • superfluid atomic gases

Cite this

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Controlling quantum transport via dissipation engineering. / Damanet, Francois; Mascarenhas, Eduardo; Pekker, David; Daley, Andrew.

In: Physical Review Letters, Vol. 123, No. 18, 180402, 01.11.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Controlling quantum transport via dissipation engineering

AU - Damanet, Francois

AU - Mascarenhas, Eduardo

AU - Pekker, David

AU - Daley, Andrew

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AB - Inspired by the microscopic control over dissipative processes in quantum optics and cold atoms, we develop an open-system framework to study dissipative control of transport in strongly interacting fermionic systems, relevant for both solid state and cold atom experiments. We show how subgap currents exhibiting Multiple Andreev Reflections -- the stimulated transport of electrons in the presence of Cooper-pairs -- can be controlled via engineering of superconducting leads or superfluid atomic gases. Our approach incorporates dissipation within the channel, which is naturally occurring and can be engineered in cold gas experiments. This opens opportunities for engineering many phenomena with transport in strongly interacting systems. As examples, we consider particle loss and dephasing, and note different behaviour for currents with different microscopic origin. We also show how to induce nonreciprocal electron and Cooper-pair currents.

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KW - superfluid atomic gases

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