Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session D02: Nonequilibrium Dynamics in Ultracold Matter
2:30 PM–5:30 PM,
Monday, March 2, 2020
Sponsoring Unit: DAMOP
Chair: Christian Gross, Max-Planck-Institute for Quantum Optics
Abstract: D02.00007 : Transport in a bosonic superfluid point contact
We discuss heat and particle transport of a weakly interacting, low temperature Bose-Einstein condensate in a quantum point contact. We show that the presence of gapless phonon modes in the condensate yields a contact resistance at zero temperature and a corresponding nonzero DC conductance. As a consequence, we predict zero thermopower and Lorenz number at zero temperature, a breakdown of the bosonic Wiedemann-Franz law. The consequences on heat and particle transport measurements in bosonic two-terminal setups should be readily observable in existing experiments.
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