UNIGE document Scientific Article
previous document  unige:87803  next document
add to browser collection
Title

Connecting strongly correlated superfluids by a quantum point contact

Authors
Husmann, D.
Krinner, S.
Lebrat, M.
Esslinger, T.
Brantut, J.-P.
Published in Science. 2015, vol. 350, no. 6267, p. 1498-1501
Abstract Point contacts provide simple connections between macroscopic particle reservoirs. In electric circuits, strong links between metals, semiconductors, or superconductors have applications for fundamental condensed-matter physics as well as quantum information processing. However, for complex, strongly correlated materials, links have been largely restricted to weak tunnel junctions. We studied resonantly interacting Fermi gases connected by a tunable, ballistic quantum point contact, finding a nonlinear current-bias relation. At low temperature, our observations agree quantitatively with a theoretical model in which the current originates from multiple Andreev reflections. In a wide contact geometry, the competition between superfluidity and thermally activated transport leads to a conductance minimum. Our system offers a controllable platform for the study of mesoscopic devices based on strongly interacting matter.
Identifiers
Full text
Structures
Research group Groupe Giamarchi
Citation
(ISO format)
HUSMANN, D. et al. Connecting strongly correlated superfluids by a quantum point contact. In: Science, 2015, vol. 350, n° 6267, p. 1498-1501. https://archive-ouverte.unige.ch/unige:87803

109 hits

0 download

Update

Deposited on : 2016-09-27

Export document
Format :
Citation style :