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Timescales of Quantum Equilibration, Dissipation and Fluctuation in Nuclear Collisions

Simenel, Cedric; Godbey, K; Umar, A S

Description

Understanding the dynamics of equilibration processes in quantum systems as well as their interplay with dissipation and fluctuation is a major challenge in quantum many-body theory. The timescales of such processes are investigated in collisions of atomic nuclei using fully microscopic approaches. Results from time-dependent Hartree-Fock and time-dependent random-phase approximation calculations are compared for 13 systems over a broad range of energies. The timescale for full mass...[Show more]

dc.contributor.authorSimenel, Cedric
dc.contributor.authorGodbey, K
dc.contributor.authorUmar, A S
dc.date.accessioned2021-03-18T23:20:07Z
dc.date.available2021-03-18T23:20:07Z
dc.identifier.issn0031-9007
dc.identifier.urihttp://hdl.handle.net/1885/227558
dc.description.abstractUnderstanding the dynamics of equilibration processes in quantum systems as well as their interplay with dissipation and fluctuation is a major challenge in quantum many-body theory. The timescales of such processes are investigated in collisions of atomic nuclei using fully microscopic approaches. Results from time-dependent Hartree-Fock and time-dependent random-phase approximation calculations are compared for 13 systems over a broad range of energies. The timescale for full mass equilibration (∼2x× 10−20s) is found to be much larger than timescales for neutron-to-proton equilibration, kinetic energy, and angular momentum dissipations which are on the order of 10−21s. Fluctuations of mass numbers in the fragments and correlations between their neutron and proton numbers build up within only a few 10−21s. This indicates that dissipation is basically not impacted by mass equilibration, but is mostly driven by the exchange of nucleons between the fragments.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Physical Society
dc.rights© 2020 American Physical Society
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourcePhysical Review Letters
dc.source.urihttps://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.212504
dc.titleTimescales of Quantum Equilibration, Dissipation and Fluctuation in Nuclear Collisions
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume124
dc.date.issued2020
local.identifier.absfor020202 - Nuclear Physics
local.identifier.ariespublicationa383154xPUB13549
local.publisher.urlhttps://journals.aps.org
local.type.statusPublished Version
local.contributor.affiliationSimenel, Cedric, College of Science, ANU
local.contributor.affiliationGodbey, K, Vanderbilt University
local.contributor.affiliationUmar, A S, Vanderbilt University
local.bibliographicCitation.issue21
local.identifier.doi10.1103/PhysRevLett.124.212504
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2020-11-22T07:18:53Z
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/13640..."author can archive publisher's version/PDF" from Sherpa/Romeo site as at 19/03/2021
dc.rights.licenseCreative Commons Attribution Non Commercial (CC BY-NC 4.0) license
CollectionsANU Research Publications

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