Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Ferrero, Renata"'
Autor:
Achour, Jibril Ben, Benedetti, Dario, Bojowald, Martin, Brandenberger, Robert, Butera, Salvatore, Ferrero, Renata, Giacomini, Flaminia, Giesel, Kristina, Goeller, Christophe, Haas, Tobias, Höhn, Philipp A., Kirklin, Joshua, Marchetti, Luca, Oriti, Daniele, Percacci, Roberto, Pereira, Antonio D., Pithis, Andreas G. A., Sakellariadou, Mairi, Steinhaus, Sebastian, Thürigen, Johannes
This collection of perspective pieces captures recent advancements and reflections from a dynamic research community dedicated to bridging quantum gravity, hydrodynamics, and emergent cosmology. It explores four key research areas: (a) the interplay
Externí odkaz:
http://arxiv.org/abs/2411.12628
Autor:
Falls, Kevin, Ferrero, Renata
We investigate the renormalisation of Einstein gravity using a novel subtraction scheme in dimensional regularisation. The one-loop beta function for Newton's constant receives contributions from poles in even dimensions and can be mapped to the beta
Externí odkaz:
http://arxiv.org/abs/2411.00938
Autor:
Ferrero, Renata, Thiemann, Thomas
In a recent contribution we identified possible points of contact between the asymptotically safe and canonical approach to quantum gravity. The idea is to start from the reduced phase space (often called relational) formulation of canonical quantum
Externí odkaz:
http://arxiv.org/abs/2404.18224
Autor:
Ferrero, Renata, Percacci, Roberto
We consider a quantum scalar field in a classical (Euclidean) De Sitter background, whose radius is fixed dynamically by Einstein's equations. In the case of a free scalar, it has been shown by Becker and Reuter that if one regulates the quantum effe
Externí odkaz:
http://arxiv.org/abs/2404.12357
Publikováno v:
J. Math. Phys. 65 (2024) 082301
We compute the heat kernel coefficients that are needed for the regularization and renormalization of massive gravity. Starting from the Stueckelberg action for massive gravity, we determine the propagators of the different fields (massive tensor, ve
Externí odkaz:
http://arxiv.org/abs/2312.10816
We show that there exists a generalized, universal notion of the trace anomaly for theories which are not conformally invariant at the classical level. The definition is suitable for any regularization scheme and clearly states to what extent the cla
Externí odkaz:
http://arxiv.org/abs/2312.07666
We apply a novel background independent regularization scheme, the $N$-cutoffs, to self-consistently quantize scalar and metric fluctuations on the maximally symmetric but non-compact hyperbolic space. For quantum matter fields on a classical backgro
Externí odkaz:
http://arxiv.org/abs/2302.03547
Autor:
Ferrero, Renata, Ripken, Chris
Publikováno v:
JHEP 08 (2023) 199
We employ a manifestly covariant formalism to compute the tree-level amputated Green's function of non-minimally coupled scalar fields in quadratic gravity in a de Sitter background. We study this Green's function in the adiabatic limit, and construc
Externí odkaz:
http://arxiv.org/abs/2212.08052
Autor:
Ferrero, Renata, Reuter, Martin
Quantum Einstein Gravity (QEG), nonperturbatively renormalized by means of a certain asymptotically safe renormalization group (RG) trajectory, is explored by solving its scale dependent effective field equations and embedding the family of emerging
Externí odkaz:
http://arxiv.org/abs/2205.12030
Autor:
Ferrero, Renata, Reuter, Martin
Within the functional renormalization group approach to Background Independent quantum gravity, we explore the scale dependent effective geometry of the de Sitter solution dS${}_4$. The investigation employs a novel approach whose essential ingredien
Externí odkaz:
http://arxiv.org/abs/2203.08003