PIRSA:09050062

Perturbative Bounds in Inflation & Quantum Loops

Leblond, L. (2009). Perturbative Bounds in Inflation & Quantum Loops. Perimeter Institute. https://pirsa.org/09050062

Leblond, Louis. Perturbative Bounds in Inflation & Quantum Loops. Perimeter Institute, May. 22, 2009, https://pirsa.org/09050062 

          @misc{ pirsa_PIRSA:09050062,
            doi = {10.48660/09050062},
            url = {https://pirsa.org/09050062},
            author = {Leblond, Louis},
            keywords = {Cosmology},
            language = {en},
            title = {Perturbative Bounds in Inflation \& Quantum Loops},
            publisher = {Perimeter Institute},
            year = {2009},
            month = {may},
            note = {PIRSA:09050062 see, \url{https://pirsa.org}}
          }

Louis Leblond Pennsylvania State University

DOI 10.48660/09050062
Collection
Talk Type Conference
Subject

Abstract

We estimate the size of loop corrections in various inflationary systems and determine the region of parameter space where the perturbation theory around a quasi de Sitter background is strongly coupled. In some models, we argue that backreaction to the inflatonary background become important before the erturbations become strongly coupled while in others, there seems to exist a legitimate strongly coupled but still inflating regime. We also demonstrate that loop effects could be dominant in the bispectrum while still having a well controlled perturbation theory and we explore the phenomenological implications.