One-dimensional transport of bosons between weakly linked reservoirs

Simpson, D P, Gangardt, D M, Lerner, I V and Krüger, P (2014) One-dimensional transport of bosons between weakly linked reservoirs. Physical Review Letters, 112 (10). 0601. ISSN 0031-9007

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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 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

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Atomic, Molecular and Optical Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Richard Chambers
Date Deposited: 24 Jan 2017 15:11
Last Modified: 17 Jan 2018 10:35

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