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dc.contributor.advisorHutchinson, David
dc.contributor.authorMitchell, Nikolas Mark
dc.date.available2019-08-09T03:08:10Z
dc.date.copyright2019
dc.identifier.citationMitchell, N. M. (2019). Feynman, vortices and resistance in atomtronic circuits (Thesis, Master of Science). University of Otago. Retrieved from http://hdl.handle.net/10523/9535en
dc.identifier.urihttp://hdl.handle.net/10523/9535
dc.description.abstractIn a 1955 paper on liquid helium Richard Feynman suggested that a superfluid flowing at sufficient speed through a channel into an infinite reservoir would produce uniformly spaced vortex pairs from the corners of the channel mouth. He argued that the critical velocity which separates the regime of vortex production from the dissipation-free regime is given by v_c=hbar/(md)*ln(d/a), where d is the width of the channel and a is on the order of the interparticle spacing. We numerically investigate this conjecture by simulating the fluid dynamics of a 87Rb BEC in a quasi-2D optical trap. We then explore the applicability of this conjecture to a more experimentally realisable "dumbbell" potential, with possible applications in the emerging field of atomtronics.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherUniversity of Otago
dc.rightsAll items in OUR Archive are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectsuperfluidity
dc.subjectresistance
dc.subjectvortices
dc.subjectfeynman
dc.subjectatomtronics
dc.titleFeynman, vortices and resistance in atomtronic circuits
dc.typeThesis
dc.date.updated2019-08-09T02:39:05Z
dc.language.rfc3066en
thesis.degree.disciplinePhysics
thesis.degree.nameMaster of Science
thesis.degree.grantorUniversity of Otago
thesis.degree.levelMasters
otago.openaccessOpen
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