Transitions and excitations in a superfluid stream passing small impurities

Handle URI:
http://hdl.handle.net/10754/600067
Title:
Transitions and excitations in a superfluid stream passing small impurities
Authors:
Pinsker, Florian; Berloff, Natalia G.
Abstract:
We analyze asymptotically and numerically the motion around a single impurity and a network of impurities inserted in a two-dimensional superfluid. The criticality for the breakdown of superfluidity is shown to occur when it becomes energetically favorable to create a doublet—the limiting case between a vortex pair and a rarefaction pulse on the surface of the impurity. Depending on the characteristics of the potential representing the impurity, different excitation scenarios are shown to exist for a single impurity as well as for a lattice of impurities. Depending on the lattice characteristics it is shown that several regimes are possible: dissipationless flow, excitations emitted by the lattice boundary, excitations created in the bulk, and the formation of large-scale structures.
Citation:
Pinsker F, Berloff NG (2014) Transitions and excitations in a superfluid stream passing small impurities. Physical Review A 89. Available: http://dx.doi.org/10.1103/PhysRevA.89.053605.
Publisher:
American Physical Society (APS)
Journal:
Physical Review A
Issue Date:
8-May-2014
DOI:
10.1103/PhysRevA.89.053605
Type:
Article
ISSN:
1050-2947; 1094-1622
Sponsors:
F.P. is financially supported by the UK Engineering and Physical Sciences Research Council (EPSRC) Grant No. EP/H023348/1 for the University of Cambridge Centre for Doctoral Training, the Cambridge Centre for Analysis, and a KAUST grant.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorPinsker, Florianen
dc.contributor.authorBerloff, Natalia G.en
dc.date.accessioned2016-02-28T06:35:23Zen
dc.date.available2016-02-28T06:35:23Zen
dc.date.issued2014-05-08en
dc.identifier.citationPinsker F, Berloff NG (2014) Transitions and excitations in a superfluid stream passing small impurities. Physical Review A 89. Available: http://dx.doi.org/10.1103/PhysRevA.89.053605.en
dc.identifier.issn1050-2947en
dc.identifier.issn1094-1622en
dc.identifier.doi10.1103/PhysRevA.89.053605en
dc.identifier.urihttp://hdl.handle.net/10754/600067en
dc.description.abstractWe analyze asymptotically and numerically the motion around a single impurity and a network of impurities inserted in a two-dimensional superfluid. The criticality for the breakdown of superfluidity is shown to occur when it becomes energetically favorable to create a doublet—the limiting case between a vortex pair and a rarefaction pulse on the surface of the impurity. Depending on the characteristics of the potential representing the impurity, different excitation scenarios are shown to exist for a single impurity as well as for a lattice of impurities. Depending on the lattice characteristics it is shown that several regimes are possible: dissipationless flow, excitations emitted by the lattice boundary, excitations created in the bulk, and the formation of large-scale structures.en
dc.description.sponsorshipF.P. is financially supported by the UK Engineering and Physical Sciences Research Council (EPSRC) Grant No. EP/H023348/1 for the University of Cambridge Centre for Doctoral Training, the Cambridge Centre for Analysis, and a KAUST grant.en
dc.publisherAmerican Physical Society (APS)en
dc.titleTransitions and excitations in a superfluid stream passing small impuritiesen
dc.typeArticleen
dc.identifier.journalPhysical Review Aen
dc.contributor.institutionDepartment of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, CB3 0WA, United Kingdomen
dc.contributor.institutionCambridge-Skoltech Quantum Fluids Laboratory, Skolkovo Institute of Science and Technology ul. Novaya, d.100, Skolkovo 143025 Russian Federationen
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