Entropy- and Flow-Induced Superfluid 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
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.
IdentifiersURN: urn:nbn:se:kth:diva-154772DOI: 10.1103/PhysRevLett.113.055301ISI: 000342692200010ScopusID: 2-s2.0-84905240689OAI: oai:DiVA.org:kth-154772DiVA: diva2:759658
FunderKnut and Alice Wallenberg FoundationSwedish Research Council