TY  - GEN
Y1  - 2021///
CY  - Heidelberg
ID  - heidok30645
A1  - Schiffer, Marc
TI  - Probing Quantum Gravity: Theoretical and phenomenological consistency tests of asymptotically safe quantum gravity
AV  - public
N2  - Asymptotically safe quantum gravity might provide a unified description of the fundamental dynamics of quantum gravity and matter. Asymptotic safety is the quantum realization of scale symmetry. In general, symmetries constrain the possible interactions and dynamics of a system. Scale symmetry is no exception and imposes constraints on the dynamics and interactions of quantum gravity and matter.  In this thesis, we will investigate aspects of asymptotically safe quantum gravity, and present indications that it passes several theoretical and phenomenological consistency tests.

We will find indications that a lattice formulation of asymptotically safe quantum gravity features an appropriate classical regime. Furthermore, we will investigate under which conditions a scale invariant regime at high energies is consistent with the low-energy matter degrees of freedom and their interactions. We will see that the interplay of quantum gravity and matter might put lower bounds on the number of fermions in our universe, and even constrain fundamental parameters of our universe, such as its dimensionality. 

Even if not realized at arbitrarily high energies, approximate scale invariance at intermediate energies could still govern the dynamics of nature. We will find  indications that also in such scenarios, much of the predictive power of the asymptotically safe fixed point persists. It might allow translating bounds on symmetry violations in the matter sector into indirect bounds on violations of this symmetry in the gravitational sector.
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/30645/
ER  -