Matter matters in asymptotically safe quantum gravity
APA
(2013). Matter matters in asymptotically safe quantum gravity. Perimeter Institute. https://pirsa.org/13110048
MLA
Matter matters in asymptotically safe quantum gravity. Perimeter Institute, Nov. 07, 2013, https://pirsa.org/13110048
BibTex
@misc{ pirsa_PIRSA:13110048, doi = {10.48660/13110048}, url = {https://pirsa.org/13110048}, author = {}, keywords = {Quantum Gravity}, language = {en}, title = {Matter matters in asymptotically safe quantum gravity}, publisher = {Perimeter Institute}, year = {2013}, month = {nov}, note = {PIRSA:13110048 see, \url{https://pirsa.org}} }
Collection
Talk Type
Subject
Abstract
The Functional
Renormalisation Group technique has received great attention in recent times
proving itself as a powerful tool to describe the high energy behaviour of
gravitational interactions.
Its key ingredient is a nontrivial fixed point of the theory renormalization group flow which controls the behavior of the coupling constants in the ultraviolet regime and ensures that physical quantities are safe from divergences. I will briefly review the main ingredients of the gravitational asymptotic safety framework before focusing on the effect of massless minimally coupled scalars, fermions and vector fields on the gravitational fixed point. I will then set bounds on the type and number of such fields requiring the existence of a UV attractive fixed point. I will also discuss the dynamically generated quantum-gravity scale in asymptotic safety, which is the transition scale to the fixed-point regime, and its variation as a function of matter degrees of freedom. To conclude I will also consider the case of higher dimensional models.
Its key ingredient is a nontrivial fixed point of the theory renormalization group flow which controls the behavior of the coupling constants in the ultraviolet regime and ensures that physical quantities are safe from divergences. I will briefly review the main ingredients of the gravitational asymptotic safety framework before focusing on the effect of massless minimally coupled scalars, fermions and vector fields on the gravitational fixed point. I will then set bounds on the type and number of such fields requiring the existence of a UV attractive fixed point. I will also discuss the dynamically generated quantum-gravity scale in asymptotic safety, which is the transition scale to the fixed-point regime, and its variation as a function of matter degrees of freedom. To conclude I will also consider the case of higher dimensional models.