Speaker: 
Anthony Preston
Speaker affiliation: 
University of Southampton
Date: 
Thursday, January 22, 2015 - 13:00
Room: 
Building 46, seminar room (5th floor)
Title: 
Gravity and cosmology at different scales of length
Abstract: 
The existence of a small positive cosmological constant motivates the study of gravity at different length scales. I will begin by discussing back-reaction, which is the effect of small-scale metric fluctuations on the large-scale behaviour of the universe, in modified gravity and its implications for dark energy. Then I will discuss my current work on quantum gravity via the exact renormalisation group and motivate future work on supermanifolds and dimensional reduction in the UV.