PIRSA:19090097

Dynamical constraints on RG flows and cosmology

Hartman, T. (2019). Dynamical constraints on RG flows and cosmology. Perimeter Institute. https://pirsa.org/19090097

Hartman, Thomas. Dynamical constraints on RG flows and cosmology. Perimeter Institute, Sep. 09, 2019, https://pirsa.org/19090097 

          @misc{ pirsa_PIRSA:19090097,
            doi = {10.48660/19090097},
            url = {https://pirsa.org/19090097},
            author = {Hartman, Thomas},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {Dynamical constraints on RG flows and cosmology},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {sep},
            note = {PIRSA:19090097 see, \url{https://pirsa.org}}
          }

Thomas Hartman Cornell University

DOI 10.48660/19090097
Collection
Talk Type Scientific Series
Subject

Abstract

In QFT, the renormalization group is usually formulated in Euclidean signature. I will discuss time-dependent probes of the RG, in Lorentzian signature, and derive new dynamical constraints that govern the spread of local operators. Through a chain of Wick rotations and dualities, the same methods lead to new sum rules for inflationary correlators, which relate observable quantities like the inflationary speed of sound to properties of the UV.