Physics of Hollow Bose-Einstein Condensates

dc.contributor.authorPadavic, Karmelaen_US
dc.contributor.authorSun, Kueien_US
dc.contributor.authorLannert, Courtneyen_US
dc.contributor.authorVishveshwara, Smithaen_US
dc.contributor.utdAuthorSun, Kueien_US
dc.descriptionFull text access from Treasures at UT Dallas is restricted to current UTD affiliates.en_US
dc.description.abstractBose-Einstein condensate shells, while occurring in ultracold systems of coexisting phases and potentially within neutron stars, have yet to be realized in isolation on Earth due to the experimental challenge of overcoming gravitational sag. Motivated by the expected realization of hollow condensates by the space-based Cold Atomic Laboratory in microgravity conditions, we study a spherical condensate undergoing a topological change from a filled sphere to a hollow shell. We argue that the collective modes of the system show marked and robust signatures of this hollowing transition accompanied by the appearance of a new boundary. In particular, we demonstrate that the frequency spectrum of the breathing modes shows a pronounced depression as it evolves from the filled-sphere limit to the hollowing transition. Furthermore, when the center of the system becomes hollow surface modes show a global restructuring of their spectrum due to the availability of a new, inner, surface for supporting density distortions. We pinpoint universal features of this topological transition as well as analyse the spectral evolution of collective modes in the experimentally relevant case of a bubble-trap.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.description.sponsorshipThis research was supported by "ARO (W911NF-12-1-0334), AFOSR (FA9550-13-1-0045), NSF (PHY-1505496), (DMR-1243574); NASA (SUB JPL 1553869 and 1553885).en_US
dc.identifier.bibliographicCitationPadavic, Karmela, Kuei Sun, Courtney Lannert, and Smitha Vishveshwara. 2017. "Physics of hollow Bose-Einstein condensates." EPL 120(2), doi:10.1209/0295-5075/120/20004en_US
dc.publisherIOP Publishing Ltden_US
dc.rights©2018 EPLAen_US
dc.sourceEPL (Europhysics Letters)
dc.subjectCollective excitationsen_US
dc.subjectReduced gravity environmentsen_US
dc.subjectBose-Einstein condensationen_US
dc.titlePhysics of Hollow Bose-Einstein Condensatesen_US


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