Superfluid Signatures in a Dissipative Quantum Point Contact
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Date
2023-05-19
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Journal Article
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Abstract
We measure superfluid transport of strongly interacting fermionic lithium atoms through a quantum point contact with local, spin-dependent particle loss. We observe that the characteristic non-Ohmic superfluid transport enabled by high-order multiple Andreev reflections transitions into an excess Ohmic current as the dissipation strength exceeds the superfluid gap. We develop a model with mean-field reservoirs connected via tunneling to a dissipative site. Our calculations in the Keldysh formalism reproduce the observed nonequilibrium particle current, yet do not fully explain the observed loss rate or spin current.
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published
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130 (20)
Pages / Article No.
200404
Publisher
American Physical Society
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03599 - Esslinger, Tilman / Esslinger, Tilman
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182650 - Interplay between Topology, Interactions and Dissipation in Driven Quantum Many-Body Systems (SNF)
212168 - Tailoring interactions in quantum matter (SNF)
742579 - Mass, heat and spin transport in interlinked quantum gases (EC)
212168 - Tailoring interactions in quantum matter (SNF)
742579 - Mass, heat and spin transport in interlinked quantum gases (EC)