Theoretical Cosmology meetings

To actively encourage the field of theoretical cosmology and to set an informal stage for the exchange of ideas, the Dutch theoretical cosmology community organizes Friday afternoon meetings approximately 6 times a year — usually on the first Friday of the month. The meetings typically start in the afternoon with a main speaker, followed by a short break to continue with another seminar or journal club discussion on some topic of current interest. We end the afternoon with drinks. The supporting institutes in Leiden, Amsterdam, Groningen, Utrecht where recently joined by the strings and cosmology group in Leuven and take turns in hosting the event.

Loading Events

« All Events

  • This event has passed.

Amsterdam Fall 2017

10/11/2017 @ 14:00 - 17:00

Amsterdam, November 10th, 2017

The meeting will take place at Nikhef in room H331.

14:00-15:00 Talk by William Cottrell (UvA)
Title: Weak Gravity Constraints in Inflation


In this talk I will summarize constraints that the axionic form of the Weak Gravity Conjecture places on inflation models and attempts to circumvent these constraints. I will also discuss applications of the Weak Gravity Conjecture to monodromy models.


15:00 – 15:30 Coffee

15:30-16:30 Talk by Vincent Vennin (APC, Paris & Portsmouth U., ICG)
Title: Stochastic Inflation and Primordial Black Holes


In the inflationary paradigm, the transition from quantum fluctuations to classical but stochastic density perturbations plays an important role. In particular, it implies that the super-Hubble degrees of freedom can be described with a classical stochastic theory, the “stochastic inflation” formalism.In this framework, the short-wavelength quantum fluctuations act as a classical noise on the dynamics of the super-Hubble scales.

I will explain which signatures are left by this quantum backreaction on the correlation functions of primordial cosmological perturbations. I will discuss the conditions under which these can be large even at sub-Planckian energy, and I will explain which prospects it opens for probing quantum gravity effects on inflationary dynamics. As an application, I will show how the formation of primordial black holes from inflation is dominated by these stochastic effects.


16:30: Borrel


14:00 - 17:00
Event Category:


Jan Pieter van der Schaar


Science Park 105
Amsterdam, 1098 XG
+ Google Map
+31 (0)20 592 2000