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Theory Seminar (High Energy/Cosmology)
A global perspective on string inflation
Date: Tuesday, October 4th
Time: 4:00 pm
Place: Chamberlin 5280
Speaker: Ted van der Aalst, Leiden University
Abstract: Although inflation is a coarse phenomenon in classical gravity, it is remarkably difficult to describe it in (worldsheet) string theory due to a sensitive dependence on global information of the theory. This sensitivity provides an opportunity to probe stringy phenomena by cosmological observations, but only if the model is fully rooted into string theory. We will discuss some of the requirements for obtaining string inflation both in a supergravity context as well as from a worldsheet perspective. At the worldsheet level, inflation indeed poses coarse but generic conditions on the worldsheet theory, manifesting itself via non-perturbative effects.
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