1. One-Dimensional Transport of Bosons between Weakly Linked Reservoirs.
- Author
-
Simpson, D. P., Gangardt, D. M., Lerner, I. V., and Krüger, P.
- Subjects
- *
BOSONS , *RESERVOIRS , *CHEMICAL potential , *JOSEPHSON effect , *CONDENSED matter , *MATHEMATICAL models - Abstract
We study a flow of ultracold bosonic atoms through a one-dimensional channel that connects two macroscopic three-dimensional reservoirs of Bose-condensed atoms via weak links implemented as potential barriers between each of the reservoirs and the channel. We consider reservoirs at equal chemical potentials so that a superflow of the quasicondensate through the channel is driven purely by a phase difference 2Φ imprinted between the reservoirs. We find that the superflow never has the standard Josephson form ∼sin 2Φ. Instead, the superflow discontinuously flips direction at 2Φ=±π and has metastable branches. We show that these features are robust and not smeared by fluctuations or phase slips. We describe a possible experimental setup for observing these phenomena. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF