Speaker
Martin Reuter
Description
The cosmological constant induced by quantum vacuum fluctuations is reconsidered within a manifestly Background Independent approach to quantum field theory and quantum gravity. It is shown that in absence of any distinguished rigid spacetime they do not give rise to the notorious “cosmological constant problem”. The nonperturbative functional renormalization group for gravity plays a central role, but no specific UV behavior (e. g. Asymptotic Safety) is required.
