Samenvatting
We study the quench of a degenerate ultracold Bose gas to the unitary regime, where interactions are as strong as allowed by quantum mechanics. We lay the foundations of a cumulant theory able to capture simultaneously the three-body Efimov effect and ergodic evolution. After an initial period of rapid quantum depletion, a universal prethermal stage is established characterized by a kinetic temperature and an emergent Bogoliubov dispersion law while the microscopic degrees of freedom remain far-from-equilibrium. Integrability is then broken by higher-order interaction terms in the many-body Hamiltonian, leading to a momentum-dependent departure from power law to decaying exponential behavior of the occupation numbers at large momentum. We find also signatures of the Efimov effect in the many-body dynamics and make a precise identification between the observed beating phenomenon and the binding energy of an Efimov trimer. Throughout the work, our predictions for a uniform gas are quantitatively compared with experimental results for quenched unitary Bose gases in uniform potentials.
Originele taal-2 | Engels |
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Artikelnummer | 063314 |
Aantal pagina's | 29 |
Tijdschrift | Physical Review A |
Volume | 102 |
Nummer van het tijdschrift | 6 |
DOI's | |
Status | Gepubliceerd - 11 dec. 2020 |
Bibliografische nota
38 pages, 12 figuresFinanciering
Belgian American Educational Foundation
Financiers | Financiernummer |
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European Union’s Horizon Europe research and innovation programme | |
Research Foundation Flanders | G042915N, G016219N |
H2020 Marie Skłodowska-Curie Actions | 665501 |
Fonds Wetenschappelijk Onderzoek | |
Nederlandse Organisatie voor Wetenschappelijk Onderzoek | 680-47-623 |
Foundation for Fundamental Research on Matter |
Vingerafdruk
Duik in de onderzoeksthema's van 'Cumulant theory of the unitary Bose gas: Prethermal and Efimovian dynamics'. Samen vormen ze een unieke vingerafdruk.Datasets
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Cumulant SNEG Codes
Colussi, V. E. (Ontwerper), Kurkjian, H. (Ontwerper), Van Regemortel, M. (Bijdrager), Musolino, S. (Ontwerper), van de Kraats, J. (Bijdrager), Wouters, M. (Ontwerper) & Kokkelmans, S. J. J. M. F. (Ontwerper), 4TU.Centre for Research Data, 21 jul. 2020
DOI: 10.4121/uuid:720f48bc-e64e-47e1-8910-09f6832a09bb
Dataset