Speaker
Prof.
Matthias Bartelmann
(Heidelberg University)
Description
The evolution of cosmic structures, in particular in its late, non-linear phases, provides important clues on the evolution of the Universe as a whole. In view of possible, subtle deviations from general relativity and the cosmological standard model, non-linear cosmic structures as for example traced by the population of galaxy clusters may act as magnifiers to enhance small dynamical effects above observational thresholds. For drawing such conclusions, we need to understand cosmic structure formation in detail in particular on small scales and at late times.
In the first half of this overview talk, I will review the cosmological standard model and the standard approach to the formation and evolution of cosmic structures. In the second half, I will discuss a new approach to cosmic structure formation based on a non-equilibrium, statistical field theory for correlated, classical particle ensembles. First applications of this theory show that it allows to calculate statistical properties of cosmic structures at low orders in perturbation theory even at small scales and deeply in the non-linear regime. The theory builds on first principles and is free of adjustable parameters.
| Overview or Regular Talk? | Overview: 75 min. |
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Primary author
Prof.
Matthias Bartelmann
(Heidelberg University)
