München 2019 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 4: Cosmology II

GR 4.2: Talk

Tuesday, March 19, 2019, 14:15–14:30, HS 4

Non-linear cosmic structure formation with Fuzzy Dark Matter using Kinetic Field Theory — •Carsten Littek — Zentrum für Astronomie Heidelberg, Heidelberg, Germany

In recent years, Fuzzy Dark Matter (FDM) such as an Ultra-Light Axion has attracted much interest. The FDM particle is an extremely light scalar boson, and the FDM dynamics is that of a condensate. The particles are therefore subject not only to gravity but also to a quantum potential which acts repulsively. Kinetic Field Theory (KFT) is a non-equilibrium statistical field theory which describes structures as ensembles of classical Hamiltonian particles in phase-space. I will present how FDM and the quantum potential can be included in the KFT approach to structure formation. In comparison to Cold Dark Matter we find differences in the power-spectrum on scales near the onset of non-linear structure formation.