Speaker
Tomás Codina
Date/Time
Date(s) - 22/02/2022
11:00 - 12:00
Location
IRIS Building, Room 1.221
String theory is a promising candidate for a quantum theory of gravity which exhibits novel features such as dualities and a low energy effective action, containing an infinite number of corrections to General Relativity. Interestingly, these two characteristics are related to each other, such that, in particular, T-duality can be used to constrain the form of the stringy corrections to Einstein’s gravity. Restricting the case to a cosmological background, in this talk, we will explore how we can use T-duality to get the low energy effective action of bosonic strings by a beta-function computation. While the 1 and 2-loop cases are relatively easy to do by hand, the complexity of the 3-loop case requires presenting the problem in the form of a series of steps, or a “recipe”, that hopefully can be automized from beginning to end.