We have created cold-atom analogues of mesoscopic conductors and superconductors. A narrow channel made of light connects two macroscopic reservoirs of fermionic atoms. We induced a current through the channel and study ballistic, diffusive, superconducting and disordered regimes. Our approach opens the way towards quantum simulation of mesoscopic devices with quantum gases.
Tilman Esslinger is full professor at the Physics Department of ETH Zurich and received his PhD from the Ludwig-Maximilians-University in Munich. In his research he uses ultracold atoms to synthetically create and study key models of quantum many-body physics. He pioneered bosonic and fermionic Hubbard models, one dimensional quantum gases and atom lasers. Most recently, he and his team have been able to observe the Dicke quantum phase transition in a superfluid coupled to an optical cavity.