Document Type
Article
Publication Date
7-25-2014
Publication Title
Physical Review Letters
DOI
10.1103/PhysRevLett.113.045305
ISSN
1079-7114
Abstract
We report the direct observation of resistive flow through a weak link in a weakly interacting atomic Bose-Einstein condensate. Two weak links separate our ring-shaped superfluid atomtronic circuit into two distinct regions, a source and a drain. Motion of these weak links allows for creation of controlled flow between the source and the drain. At a critical value of the weak link velocity, we observe a transition from superfluid flow to superfluid plus resistive flow. Working in the hydrodynamic limit, we observe a conductivity that is 4 orders of magnitude larger than previously reported conductivities for a Bose-Einstein condensate with a tunnel junction. Good agreement with zero-temperature Gross-Pitaevskii simulations and a phenomenological model based on phase slips indicate that the creation of excitations plays an important role in the resulting conductivity. Our measurements of resistive flow elucidate the microscopic origin of the dissipation and pave the way for more complex atomtronic devices.
Recommended Citation
Jendrzejewski, Fred, Stephen Eckel, Nicholas Murray, C. Lanier, Mark Edwards, Christopher J. Lobb, Gretchen K. Campbell.
2014.
"Resistive Flow in a Weakly Interacting Bose-Einstein Condensate."
Physical Review Letters, 113: 045305-1-045305-5: American Physical Society.
doi: 10.1103/PhysRevLett.113.045305 source: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.045305
https://digitalcommons.georgiasouthern.edu/physics-facpubs/208
Comments
Authors have the right to use all or part of the Article, including the APS-prepared version without revision or modification, on the author(s)’ web home page or employer’s website. (source:http://journals.aps.org/authors/transfer-of-copyright-agreement). Article obtained from Physical Review Letters.