Superfluid Signatures in a Dissipative Quantum Point Contact

Autor:	Meng-Zi Huang, Jeffrey Mohan, Anne-Maria Visuri, Philipp Fabritius, Mohsen Talebi, Simon Wili, Shun Uchino, Thierry Giamarchi, Tilman Esslinger
Rok vydání:	2023
Předmět:	Quantum Physics Quantum Gases (cond-mat.quant-gas) Atomic Physics (physics.atom-ph) FOS: Physical sciences General Physics and Astronomy Quantum Physics (quant-ph) Condensed Matter - Quantum Gases Physics - Atomic Physics
Zdroj:	Physical Review Letters, 130 (20)
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.130.200404
Popis:	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. Physical Review Letters, 130 (20) ISSN:0031-9007 ISSN:1079-7114
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::499ad7c69a873a89d80b9bf59ea70867 https://doi.org/10.1103/physrevlett.130.200404 Zobrazit plný text záznamu