Connecting strongly correlated superfluids by a quantum point contact
Abstract
Two superconductors connected by a bridge made out of nonsuperconducting material form a so-called Josephson junction (see the Perspective by Belzig). Valtolina et al. replaced the superconductors with two reservoirs of a superfluid Fermi gas and connected them by a weak link to allow atoms to move from one side to the other. Then they made one reservoir more populated than the other and studied the ensuing dynamics as a function of interaction strength between the atoms. In a related experiment, Husmann et al. kept the interaction strength at its maximum, but varied the temperature and the properties of the link. As temperature increased, the superfluid disappeared and thermal transport took over.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 18, 2015
- Source ID
- 10.1126/science.aac9584
Entities
People
- Dominik Husmann
- Jean-philippe Brantut
- Martin Lebrat
- Sebastian Krinner
- Shun Uchino
- Thierry Giamarchi
- Tilman Esslinger
Organizations
- ETH Zurich
- European Research Council
- Seventh Framework Programme
- Swiss National Science Foundation
- University of Geneva