Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Martini, Riccardo"'
We study substructures of the Weyl group of conformal transformations of the metric of (pseudo)Riemannian manifolds. These substructures are identified by differential constraints on the conformal factors of the transformations which are chosen such
Externí odkaz:
http://arxiv.org/abs/2404.05665
We derive the running of the $R^2$ coupling in the Starobinsky Lagrangian that stems from integrating out quantum torsion fluctuations on a maximally symmetric Euclidean background. Our analysis is performed in a manifestly covariant way, exploiting
Externí odkaz:
http://arxiv.org/abs/2312.16681
Publikováno v:
Class.Quant.Grav. 40 (2023) 19, 195005
We propose a functional measure over the torsion tensor. We discuss two completely equivalent choices for the Wheeler-DeWitt supermetric for this field, the first one being based on its algebraic decomposition, the other inspired by teleparallel theo
Externí odkaz:
http://arxiv.org/abs/2304.08360
We discuss the renormalization of Einstein-Hilbert's gravity in $d=2+\epsilon$ dimensions. We show that the application of the path-integral approach leads naturally to scheme- and gauge-independent results on-shell, but also gives a natural notion o
Externí odkaz:
http://arxiv.org/abs/2302.14804
We discuss the birth of the non-perturbative approach to quantum gravity known as quantum Einstein gravity, in which the gravitational interactions are conjectured to be asymptotically safe. The interactions are assumed to be finite and consistent at
Externí odkaz:
http://arxiv.org/abs/2210.13910
Publikováno v:
Int.J.Geom.Meth.Mod.Phys. 20 (2023) 13, 2350237
We discuss generalizations of the notions of projective transformations acting on affine model of Riemann-Cartan and Riemann-Cartan-Weyl gravity which preserve the projective structure of the light-cones. We show how the invariance under some project
Externí odkaz:
http://arxiv.org/abs/2208.10872
Autor:
Trani, Alessandro Alberto, Rieder, Steven, Tanikawa, Ataru, Iorio, Giuliano, Martini, Riccardo, Karelin, Georgii, Glanz, Hila, Zwart, Simon Portegies
We present a novel way of modeling common envelope evolution in binary and few-body systems. We consider the common envelope inspiral as driven by a drag force with a power-law dependence in relative distance and velocity. The orbital motion is resol
Externí odkaz:
http://arxiv.org/abs/2205.13537
Publikováno v:
In Engineering Structures 1 July 2024 310
Autor:
Martini, Riccardo, Toriumi, Reiko
We give a procedure to construct (quasi-)trisection diagrams for closed (pseudo-)manifolds generated by colored tensor models without restrictions on the number of simplices in the triangulation, therefore generalizing previous works in the context o
Externí odkaz:
http://arxiv.org/abs/2110.06659
On the basis of a limited number of reasonable axioms, we discuss the classification of all the possible universality classes of diffeomorphisms invariant metric theories of quantum gravity. We use the language of the renormalization group and adopt
Externí odkaz:
http://arxiv.org/abs/2105.11870