In this talk we discuss the most recent step in an approach to finding the continuum limit of quantum gravity using the exact renormalization group and the c...
We study the phase diagram of 5-dimensional SU(2) Yang-Mills theory on the lattice. We consider two extensions of the fundamental plaquette Wilson action in ...
A suitable candidate for a UV-complete quantum theory of gravity needs to be compatible with the existence of chiral fermions. Studies of quantum fields in c...
We consider a free scalar field on Euclidean dynamical triangulations. By studying the 1-particle and 2-particle correlation functions, we extract the bindi...
Geometries describing static non-singular black holes have been obtained in suitable limits of various quantum gravity frameworks, including asymptotic safet...
A number of approaches to four-dimensional quantum gravity, such as loop quantum gravity and holography, situate areas as their fundamental variables. These ...
The question whether global symmetries can be realized in quantum-gravity-matter-systems has far-reaching phenomenological consequences. During my talk I wil...
We consider a class of models for dynamical dark energy: we construct a general effective dynamics for diffeomorphisms of spacetime, in a fixed external metr...
In this talk, the fixed point structure of asymptotically safe quantum gravity is tested for actions containing squares of the Riemann tensor and the Ricci s...
According to the asymptotic-safety conjecture, a (non-perturbatively) renormalizable quantum field theory of gravity could be constructed based on the existe...
I will describe how the framework of asymptotically safe quantum gravity can be employed to derive novel predictions for some well-known new physics solution...
In this talk the fixed point structure of gravity-fermion systems on a curved background spacetime will be discussed using the functional renormalization gro...
High-energy completeness of quantum electrodynamics (QED) can be induced by an interacting ultraviolet fixed point of the renormalization flow. We provide ev...
Asymptotic safety might have significant predictive implications for dark matter models. I illustrate this in a toy model for the visible Higgs-Yukawa sector...
Application of the Weinberg’s conditions of asymptotic safety to amplitudes and not to couplings of the effective action can help to uniquely define the runn...
We study the quantum gravitational system coupled to a charged scalar, Dirac fermions, and electromagnetic fields. We use the “exact” or “functional” renorma...
I will discuss a new flow equation for the Wilsonian effective action based on a gauge invariant UV regularisation of gauge theories and gravity. The regular...
We apply the functional renormalization group equation to a massive Fierz–Pauli action in curved space and find that, even though a massive term is a modif...
Determining the structure of the UV-critical hypersurface, spanned by renormalization group trajectories enjoying asymptotic safety, is a highly complex prob...
In this talk I will present the analysis of a dually-weighted Matrix Model which implements a preferred foliation in its dual-graph. By using the FRGE, we st...
Recent studies in the context of asymptotically safe quantum gravity imply that scalar quartic couplings and scalar masses vanish above the Planck scale due ...
The derivative expansion (DE) is the most commonly used approximation scheme of Wilson’s renormalization group (RG), at least when it is formulated in terms ...
We explore 4d gauge-Yukawa theories with weakly coupled UV fixed points. Using Majorana fermions, new families of theories with perturbatively exact asymptot...
We search for an extension of the Standard Model that contains a viable dark matter candidate and that can be embedded into a fundamental, asymptotically saf...
Constraining quantum gravity from observations is a challenge. In this seminar, I explore the idea that the interplay of quantum gravity with matter could be...
Taking manifest invariance under both gauge symmetry and diffeomorphisms as a guiding principle physical objects are constructed for Yang-Mills-Higgs theory ...
The effective action is a powerful tool for studying the non-perturbative behaviour of quantum field theories. In this talk, we will revisit the derivation ...
By definition, form factors capture the momentum dependence of a theory’s n-point function. For example, they may encode corrections to the propagation of fi...
In my talk, I explore the question why our universe is four dimensional from an asymptotically safe vantage point. I present indications that asymptotically ...
We construct a black-hole spacetime which includes the running of the gravitational coupling in a self-consistent way. Starting from a classical Schwarzschil...
The effect of gravitational fluctuations on the quantum effective potential for scalar fields is a key ingredient for predictions of the mass of the Higgs bo...
The Effective Average Action is a form of effective action which depends on a cutoff scale suppressing the contribution of low momentum modes in the function...
We consider geometric operators, such as the geodesic length and the volume of hypersurfaces, in the context of the Asymptotic Safety scenario for quantum gr...
After a short introduction on how to set up a foliation in a covariant language, I will use this formalism to investigate the RG flow on foliated spacetimes....
There are many proposals how to extend the Standard Model, designed to deal with its fundamental inconsistencies. Since no new particles have been detected e...
I derive an exact RG equation for the Wilsonian Effective Action, that is essentially a background field (and gauge invariant) version of the Polchinski equa...
This presentation aims at giving our new advance on the functional renormalization group applied to tensorial group field theory. It is based on a serie of o...
We explore whether the phase diagram of tensor models could feature a pregeometric, discrete and a geometric, continuum phase for the building blocks of spac...
We explore asymptotic safety of gravity-matter systems, discovering indications for a near-perturbative nature of these systems in the ultraviolet. Our resul...
We explain how the quantum gravity regime associated with Asymptotic Safety may set the initial conditions for a consistent cosmological evolution, from the ...
Asymptotically safe extensions of the Standard Model have been searched for by adding vector-like fermions charged under the Standard Model gauge group and h...
We study the dependence on field parametrization in the context of the Asymptotic Safety scenario. The investigation is performed with the f(R)-truncation fo...
Recent results based on renormalization group approaches to Quantum Gravity suggest that the Newton’s and Cosmological constants should be treated as dynamic...
We investigate the asymptotic safety scenario for a scalar-gravity system. This system contains two avatars of the dynamical Newton coupling, a gravitational...
I will present a new method to constrain the quantum effective action of gravity, inspired by recent results from causal dynamical triangulations (CDT). Afte...
We will discuss the instanton dynamics of asymptotically safe and free quantum field theories featuring respectively controllable ultraviolet and infrared fi...
Gravitational catalysis expresses an interplay between the curvature of the spacetime and fluctuation-induced mass generation of quantum matter. I will show ...
In this talk, we will investigate asymptotic safety of a toy model of a singlet-scalar extension of the Higgs sector including two real scalar fields under t...
We use the functional renormalization group equation for the effective average action to study the non-Gaussian renormalization group fixed points (NGFPs) ar...
We compute the one-loop effective action in unimodular gravity, starting from two different classical formulations of the theory. We find that the effective ...