Speaker
Kevin Falls (remote)
Description
In this talk I will discuss a simper picture of asymptotic safety based on an effective action that only contains the "essential" couplings that cannot be removed by a change of variables. This has technical advantages since the propagator can be ensured to take a more manageable form i.e. without developing additional poles. Using this approach the Reuter fixed point appears stable when extending the approximation. Furthermore, the results suggest that Newton's constant is the only relevant essential coupling in the absence of matter. On the conceptual side, this line of investigation hints that only the degrees of freedom of classical general relativity are necessary for its UV completion.
