One-Dimensional transport of bosons between weakly linked reservoirs

D. P. Simpson, D. M. Gangardt, I. V. Lerner, P. Krüger

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


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 ∼sin2Φ. Instead, the superflow discontinuously flips direction at 2Φ ¼ 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.
Original languageEnglish
Pages (from-to)100601
Number of pages4
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 12 Mar 2014


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