Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/12226
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dc.contributor.authorGüven, Kaanen_US
dc.contributor.authorDemirkaya, Betülen_US
dc.date.accessioned2022-08-01T11:24:54Z-
dc.date.available2022-08-01T11:24:54Z-
dc.date.issued2022-02-
dc.identifier.issn1742-6588-
dc.identifier.urihttps://doi.org/10.1088/1742-6596/2191/1/012014-
dc.identifier.urihttps://hdl.handle.net/11147/12226-
dc.description.abstractA vortex formed in the superfluid state of a Bose-Einstein condensate may exhibit superradiance a la blackhole for radially propagating acoustic fluctuations. The analogy is usually based on the so-called draining bathtub model of the vortex, in which an event horizon and ergosphere emerges when the radial velocity of the superfluid exceeds the propagation speed of sound in the condensate. The acoustic fluctuations mimic a massless scalar field in the curved Lorentzian space-time of the vortex and are governed by the Klein-Gordon wave equation. One common main approximation is the constant background density of the superfluid even in the presence of the vortex. This sets a constant relativistic sound speed. However, the vortex state solution of the Gross-Pitaevskii equation clearly shows that both the density and the speed of sound vary radially near the vortex core, where the event horizon and thus the superradiance will take place. What changes would this complex interdependence bring to the formulation and to the outcomes of the superradiance based on constant density approximation? Here, we recount this question posed under the guidance of Prof. Tekin Dereli and present recent results. We show that the self-consistent density modifies the amplification dynamics near the event horizon significantly, thereby altering the temporal and spectral fingerprint of the superradiance of the vortex.en_US
dc.language.isoenen_US
dc.publisherIOP Publishingen_US
dc.relation.ispartofJournal of Physics: Conference Seriesen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectAcoustic wave propagationen_US
dc.subjectAcoustic wave velocityen_US
dc.subjectStatistical mechanicsen_US
dc.titleEchoes from the event horizon of a superfluid vortexen_US
dc.typeArticleen_US
dc.institutionauthorDemirkaya, Betülen_US
dc.departmentİzmir Institute of Technology. Physicsen_US
dc.identifier.scopus2-s2.0-85124936671en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1088/1742-6596/2191/1/012014-
dc.contributor.affiliationKoç Üniversitesien_US
dc.contributor.affiliationIzmir Institute of Technologyen_US
dc.relation.issn1742-6588en_US
dc.description.volume2191en_US
dc.description.issue1en_US
dc.identifier.wosqualityN/A-
dc.identifier.scopusqualityQ3-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.openairetypeArticle-
item.fulltextWith Fulltext-
crisitem.author.dept01. Izmir Institute of Technology-
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
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