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Verfasst von:Lode, Axel Ulrich Jürgen [VerfasserIn]   i
 Streltsov, Alexej Iwanowitsch [VerfasserIn]   i
 Sakmann, Kaspar [VerfasserIn]   i
 Cederbaum, Lorenz S. [VerfasserIn]   i
Titel:How an interacting many-body system tunnels through a potential barrier to open space
Verf.angabe:Axel U.J. Lode, Alexej I. Streltsov, Kaspar Sakmann, Ofir E. Alon, and Lorenz S. Cederbaum
E-Jahr:2012
Jahr:August 6, 2012
Umfang:5 S.
Fussnoten:Gesehen am 26.10.2018
Titel Quelle:Enthalten in: National Academy of Sciences (Washington, DC)Proceedings of the National Academy of Sciences of the United States of America
Ort Quelle:Washington, DC : National Acad. of Sciences, 1915
Jahr Quelle:2012
Band/Heft Quelle:109(2012), 34, Seite 13521-13525
ISSN Quelle:1091-6490
Abstract:The tunneling process in a many-body system is a phenomenon which lies at the very heart of quantum mechanics. It appears in nature in the form of α-decay, fusion and fission in nuclear physics, and photoassociation and photodissociation in biology and chemistry. A detailed theoretical description of the decay process in these systems is a very cumbersome problem, either because of very complicated or even unknown interparticle interactions or due to a large number of constituent particles. In this work, we theoretically study the phenomenon of quantum many-body tunneling in a transparent and controllable physical system, an ultracold atomic gas. We analyze a full, numerically exact many-body solution of the Schrödinger equation of a one-dimensional system with repulsive interactions tunneling to open space. We show how the emitted particles dissociate or fragment from the trapped and coherent source of bosons: The overall many-particle decay process is a quantum interference of single-particle tunneling processes emerging from sources with different particle numbers taking place simultaneously. The close relation to atom lasers and ionization processes allows us to unveil the great relevance of many-body correlations between the emitted and trapped fractions of the wave function in the respective processes.
DOI:doi:10.1073/pnas.1201345109
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: http://dx.doi.org/10.1073/pnas.1201345109
 Volltext: http://www.pnas.org/content/109/34/13521
 DOI: https://doi.org/10.1073/pnas.1201345109
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:coherence
 cold atoms
 fragmentation
 many-body physics
 quantum dynamics
K10plus-PPN:1582329656
Verknüpfungen:→ Zeitschrift

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