Impact of initial fluctuations on the dissipative dynamics of interacting Fermi systems: A model case study

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dc.authoridLacroix, Denis/0000-0002-6296-2112
dc.authoridYilmaz, Bulent/0000-0003-3154-0213
dc.contributor.authorUlgen, Ibrahim
dc.contributor.authorYilmaz, Bulent
dc.contributor.authorLacroix, Denis
dc.date.accessioned2024-12-24T19:28:30Z
dc.date.available2024-12-24T19:28:30Z
dc.date.issued2019
dc.departmentSiirt Üniversitesi
dc.description.abstractStandard methods used for computing the dynamics of a quantum many-body system are the mean-field (MF) approximations such as the time-dependent Hartree-Fock (TDHF) approach. Even though MF approaches are quite successful, they suffer some well-known shortcomings, one of which is insufficient dissipation of collective motion. The stochastic mean-field approach (SMF), where a set of MF trajectories with random initial conditions are considered, is a good candidate to include dissipative effects beyond mean field. In this approach, the one-body density matrix elements are treated initially as a set of stochastic Gaussian c numbers that are adjusted to reproduce first and second moments of collective one-body observables. It is shown that the predictive power of the SMF approach can be further improved by relaxing the Gaussian assumption for the initial probabilities. More precisely, using Gaussian or uniform distributions for the matrix elements generally leads to overdamping for long times, whereas distributions with smaller kurtosis lead to much better reproduction of the long time evolution.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)
dc.description.sponsorshipB.Y. gratefully acknowledges useful discussions with Phuong Mai Dinh. This work was supported in part by the Scientific and Technological Research Council of Turkey (TUBITAK).
dc.identifier.doi10.1103/PhysRevC.100.054603
dc.identifier.issn2469-9985
dc.identifier.issn2469-9993
dc.identifier.issue5
dc.identifier.scopus2-s2.0-85075068728
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1103/PhysRevC.100.054603
dc.identifier.urihttps://hdl.handle.net/20.500.12604/7095
dc.identifier.volume100
dc.identifier.wosWOS:000495062700004
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review C
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241222
dc.titleImpact of initial fluctuations on the dissipative dynamics of interacting Fermi systems: A model case study
dc.typeArticle

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