Physics Seminar
Date: Thursday, 20 March 2025
Time: 1.45 PM
Venue: Lecture Hall 2
Exploring Inflation in String Theory: Single-Field vs. Multi-Field Models (part-2)
Dibya Chakraborty
IIT Madras.
20-03-25

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Abstract

In the second part of my talk, I will present a string theory motivated model where the inflaton is connected to the geometry of the internal space -- the overall volume of it drives the inflation. In particular, I will present a construction where the overall volume modulus (scalar field) is dynamically stabilized to an exponentially large value only via perturbative corrections, also known as perturbative large volume scenario (LVS). In this framework, the robustness of the single-field inflationary model is checked against possible sub-leading corrections. In the later part of my talk, I will focus on the global embedding of the fibre inflation in perturbative LVS and show how our constructions pose less challenge in realizing a successful period of inflation. Finally, I will finish the talk by stating another interesting scenario where we were able to study a three-field model of inflation in a locally flat patch. The model features an effective double inflation like behavior with the first phase dominated by one field the next phase by the other two fields. I will discuss several future directions for this model.