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Status: Bibliographieeintrag

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Verfasst von:Dombrowski, Johannes [VerfasserIn]   i
 Fabis, Felix [VerfasserIn]   i
 Bartelmann, Matthias [VerfasserIn]   i
Titel:Kinetic field theory
Titelzusatz:cosmic structure formation and fluctuation-dissipation relations
Verf.angabe:Johannes Dombrowski, Felix Fabis and Matthias Bartelmann
E-Jahr:2018
Jahr:16 February 2018
Umfang:20 S.
Fussnoten:Gesehen am 20.05.2022
Titel Quelle:Enthalten in: Journal of physics communications
Ort Quelle:Bristol : IOP Publishing Ltd., 2017
Jahr Quelle:2018
Band/Heft Quelle:2(2018), 2, Artikel-ID 025020, Seite 1-20
ISSN Quelle:2399-6528
Abstract:Building upon the recently developed formalism of Kinetic Field Theory (KFT) for cosmic structure formation by Bartelmann et al, we investigate a kinematic relationship between diffusion and gravitational interactions in cosmic structure formation. In the first part of this work we explain how the process of structure formation in KFT can be separated into three processes, particle diffusion, the accumulation of structure due to initial momentum correlations and interactions relative to the inertial motion of particles. We study these processes by examining the time derivative of the non-linear density power spectrum in the Born approximation. We observe that diffusion and accumulation are delicately balanced because of the Gaussian form of the initial conditions, and that the net diffusion, resulting from adding these two counteracting contributions, approaches the contributions from the interactions in amplitude over time. This hints at a kinematic relation between diffusion and interactions in KFT. Indeed, in the second part, we show that the response of the system to arbitrary gradient forces is directly related to the evolution of particle diffusion in the form of kinematic fluctuation-dissipation relations (FDRs). This result is independent of the interaction potential. We show that this relationship roots in a time-reversal symmetry of the underlying generating functional. Furthermore, our studies demonstrate how FDRs originating from purely kinematic arguments can be used in theories far from equilibrium.
DOI:doi:10.1088/2399-6528/aaaa8f
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: https://doi.org/10.1088/2399-6528/aaaa8f
 DOI: https://doi.org/10.1088/2399-6528/aaaa8f
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1803973730
Verknüpfungen:→ Zeitschrift

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