23–25 Jan 2023
University of Pisa
Europe/Rome timezone

Perturbative treatment of particle interactions in Kinetic Field Theory

23 Jan 2023, 15:35
25m
Aula Magna 'Fratelli Pontecorvo' (University of Pisa)

Aula Magna 'Fratelli Pontecorvo'

University of Pisa

Polo Fibonacci Building E Largo B. Pontecorvo 3 56127 Pisa
Talk/Poster

Speaker

Christophe Pixius (Heidelberg University)

Description

Finding an analytic theory to describe non-linear cosmic structure formation has proven to be a challenge that is yet to be solved in a satisfactory way.
What makes the matter so difficult is that we are looking at a system of classical particles far from equilibrium with long-range interactions.
One theory that has been developed in recent years to tackle such systems is Kinetic Field Theory (KFT), which uses the microscopic phase-space dynamics of individual particles to predict collective quantities of the entire system, such as correlation functions.
In contrast to more established analytical methods such as Eulerian- or Lagrangian perturbation theory KFT, in principle, offers a complete description of the system and does not suffer from inconsistencies arising due to the crossing particle streams.
I want to present recent progress in the description of particle interactions in the framework of KFT and how this affects our predictions for measurable quantities such as the non-linear dark matter power spectrum.

Faculty position

PhD student

Topic Field Cosmology

Primary author

Christophe Pixius (Heidelberg University)

Co-author

Prof. Matthias Bartelmann (Heidelberg University)

Presentation materials