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Entropy- and Flow-Induced Superfluid States
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics. University of Massachusetts, United States.
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 113, no 5, 055301- p.Article in journal (Refereed) Published
Abstract [en]

Normally the role of phase fluctuations in superfluids and superconductors is to drive a phase transition to the normal state. This happens due to proliferation of topologically nontrivial phase fluctuations in the form of vortices. Here we discuss a class of systems where, by contrast, nontopological phase fluctuations can produce superfluidity. Here we understand superfluidity as a phenomenon that does not necessarily arises from a broken U(1) symmetry, but can be associated with a certain class of (approximate or exact) degeneracies of the system's energy landscape giving raise to a U(1)-like phase.

Place, publisher, year, edition, pages
2014. Vol. 113, no 5, 055301- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-154772DOI: 10.1103/PhysRevLett.113.055301ISI: 000342692200010Scopus ID: 2-s2.0-84905240689OAI: oai:DiVA.org:kth-154772DiVA: diva2:759658
Funder
Knut and Alice Wallenberg FoundationSwedish Research Council
Available from: 2014-10-30 Created: 2014-10-27 Last updated: 2017-12-05Bibliographically approved

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