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Superfluid signatures in a dissipative quantum point contact
- Source :
- Phys. Rev. Lett. 130, 200404 (2023)
- Publication Year :
- 2022
-
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.<br />Comment: 17 pages, 5 figures. Meng-Zi Huang and Jeffrey Mohan contributed equally to this work
- Subjects :
- Condensed Matter - Quantum Gases
Physics - Atomic Physics
Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 130, 200404 (2023)
- Publication Type :
- Report
- Accession number :
- edsarx.2210.03371
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.130.200404