Show simple item record

dc.contributor.authorFei, Na
dc.contributor.authorPei, J. C.
dc.contributor.authorWang, K.
dc.contributor.authorKortelainen, M.
dc.date.accessioned2019-11-18T08:09:29Z
dc.date.available2019-11-18T08:09:29Z
dc.date.issued2019
dc.identifier.citationFei, Na; Pei, J. C.; Wang, K.; Kortelainen, M. (2019). Small-amplitude collective modes of a finite-size unitary Fermi gas in deformed traps. Physical Review A, 100 (5), 053613. DOI: 10.1103/PhysRevA.100.053613
dc.identifier.otherCONVID_33564072
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/66412
dc.description.abstractWe have investigated collective breathing modes of a unitary Fermi gas in deformed harmonic traps. The ground state is studied by the superfluid local density approximation (SLDA) and small-amplitude collective modes are studied by the iterative quasiparticle random phase approximation (QRPA). The results illustrate the evolutions of collective modes of a small system in traps from spherical to elongated or pancake-shaped deformations. For small spherical systems, the influences of different SLDA parameters are significant, and, in particular, a large pairing strength can shift up the oscillation frequency of collective modes. The transition currents from QRPA show that the compressional flow patterns are nontrivial and dependent on the deformation. Finally, the finite-size effects are demonstrated to be reasonable when progressing towards larger systems. The hydrodynamical results of collective frequencies can be reproduced by SLDA-QRPA with reduced pairing strengths. Our studies indicate that experiments on small and medium systems are valuable for understanding effective interactions in systems with varying sizes and trap deformations.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review A
dc.rightsIn Copyright
dc.subject.otherdensity functional theory
dc.subject.otherfermi gases
dc.subject.otherultracold gases
dc.subject.otherrandom phase approximation
dc.titleSmall-amplitude collective modes of a finite-size unitary Fermi gas in deformed traps
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201911184917
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9926
dc.relation.numberinseries5
dc.relation.volume100
dc.type.versionpublishedVersion
dc.rights.copyright© 2019 American Physical Society
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber318043
dc.subject.ysotiheysfunktionaaliteoria
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p28852
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1103/PhysRevA.100.053613
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundingprogramAcademy Project, AoFen
jyx.fundinginformationThis work was supported by the National Key R&D Program of China (Contract No. 2018YFA0404403), and the National Natural Science Foundation of China under Grants No. 11975032, No. 11835001, and No. 11790325. This work was also partially supported (M.K.) by the Academy of Finland under the Academy Project No. 318043. We also acknowledge that computations in this work were performed in Tianhe-1A located in Tianjin and Tianhe-2 located in Guangzhou.


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

In Copyright
Except where otherwise noted, this item's license is described as In Copyright