2 research outputs found
Low energy Quantum Gravity from the Effective Average Action
Within the effective average action approach to quantum gravity, we recover
the low energy effective action as derived in the effective field theory
framework, by studying the flow of possibly non-local form factors that appear
in the curvature expansion of the effective average action. We restrict to the
one-loop flow where progress can be made with the aid of the non-local heat
kernel expansion. We discuss the possible physical implications of the scale
dependent low energy effective action through the analysis of the quantum
corrections to the Newtonian potential.Comment: 24 pages, 1 figure; minor corrections, references adde
Asymptotic Safety, Emergence and Minimal Length
There seems to be a common prejudice that asymptotic safety is either
incompatible with, or at best unrelated to, the other topics in the title. This
is not the case. In fact, we show that 1) the existence of a fixed point with
suitable properties is a promising way of deriving emergent properties of
gravity, and 2) there is a sense in which asymptotic safety implies a minimal
length. In so doing we also discuss possible signatures of asymptotic safety in
scattering experiments.Comment: LaTEX, 20 pages, 2 figures; v.2: minor changes, reflecting published
versio