Quantum-Fluctuation-driven crossover from a dilute bose-einstein condensate to a macrodroplet in a dipolar quantum fluid

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dc.identifier.uri http://dx.doi.org/10.15488/1169
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/1193
dc.contributor.author Chomaz, L.
dc.contributor.author Baier, S.
dc.contributor.author Petter, D.
dc.contributor.author Mark, M.J.
dc.contributor.author Wächtler, F.
dc.contributor.author Santos, Luis
dc.contributor.author Ferlaino, F.
dc.date.accessioned 2017-02-24T08:49:30Z
dc.date.available 2017-02-24T08:49:30Z
dc.date.issued 2016
dc.identifier.citation Chomaz, L.; Baier, S.; Petter, D.; Mark, M.J.; Wächtler, F. et al.: Quantum-Fluctuation-driven crossover from a dilute bose-einstein condensate to a macrodroplet in a dipolar quantum fluid. In: Physical Review X 6 (2016), Nr. 4, 41039. DOI: https://doi.org/10.1103/PhysRevX.6.041039
dc.description.abstract In a joint experimental, theoretical effort, we report on the formation of a macrodroplet state in an ultracold bosonic gas of erbium atoms with strong dipolar interactions. By precise tuning of the s-wave scattering length below the so-called dipolar length, we observe a smooth crossover of the ground state from a dilute Bose-Einstein condensate to a dense macrodroplet state of more than 2 × 104 atoms. Based on the study of collective excitations, loss features, we prove that quantum fluctuations stabilize the ultracold gas far beyond the instability threshold imposed by mean-field interactions. Finally, we perform expansion measurements, showing that although self-bound solutions are prevented by losses, the interplay between quantum stabilization, losses results in a minimal time-of-flight expansion velocity at a finite scattering length. eng
dc.description.sponsorship DFG/RTG/1729
dc.description.sponsorship DFG/FOR/2247
dc.language.iso eng
dc.publisher College Park, MD : American Physical Society
dc.relation.ispartofseries Physical Review X 6 (2016), Nr. 4
dc.rights CC BY 3.0
dc.rights.uri https://creativecommons.org/licenses/by/3.0/
dc.subject Ground state eng
dc.subject Quantum chemistry eng
dc.subject Quantum electronics eng
dc.subject Quantum theory eng
dc.subject Shear waves eng
dc.subject Statistical mechanics eng
dc.subject Bose-Einstein condensates eng
dc.subject Collective excitations eng
dc.subject Dipolar interaction eng
dc.subject Expansion velocity eng
dc.subject Mean-field interactions eng
dc.subject Quantum fluctuation eng
dc.subject S-wave scattering lengths eng
dc.subject Scattering length eng
dc.subject Bose-Einstein condensation eng
dc.subject.ddc 530 | Physik ger
dc.title Quantum-Fluctuation-driven crossover from a dilute bose-einstein condensate to a macrodroplet in a dipolar quantum fluid
dc.type article
dc.type Text
dc.relation.issn 2160-3308
dc.relation.doi https://doi.org/10.1103/PhysRevX.6.041039
dc.bibliographicCitation.issue 4
dc.bibliographicCitation.volume 6
dc.bibliographicCitation.firstPage 41039
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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