299 citations · 924 across the 41 of their papers we have counts for
7 papers · 1 filter
formalism on the past light-cone
Giuseppe Fanizza, Giovanni Marozzi, Matheus Medeiros
We apply the gradient expansion approximation to the light-cone gauge, obtaining a separate universe picture at non-linear order in perturbation theory within this framework. There…
From the string vacuum to FLRW or de Sitter via corrections
P. Conzinu, G. Fanizza, M. Gasperini +3
We first make more precise a recent "Hamiltonian" reformulation of the Hohm-Zwiebach approach to the tree-level, -invariant string cosmology equations at all orders in the…
A Simple, Exact Formulation of Number Counts in the Geodesic-Light-Cone Gauge
G. Fanizza, M. Gasperini, G. Marozzi
In this article, we compare different formulations of the number count prescription using the convenient formalism of the Geodesic-Light-Cone gauge. We then find a simple, exact, a…
The skewness of the distance-redshift relation in CDM
Tiziano Schiavone, Enea Di Dio, Giuseppe Fanizza
Starting from a recently proposed framework for the evaluation of the cosmological averages, we evaluate the higher-order moments for the distribution of a given observable. Then,…
Dispersive effects in two- and three-dimensional peridynamics
Alessandro Coclite, Giuseppe Maria Coclite, Giuseppe Fanizza +1
In this paper we study the dispersive properties related to a model of peridynamic evolution, governed by a non local initial value problem, in the cases of two and three spatial d…
Gauge invariance on the light-cone: curvature perturbations and radiative degrees of freedom
Giuseppe Fanizza, Giovanni Marozzi, Matheus Medeiros
We derive the expressions on the observed light-cone for some relevant cosmological gauge invariant variables, such as the Mukhanov-Sasaki variable and - and - modes of the t…
Comment on "A fractal LTB model cannot explain Dark Energy''
Leonardo Cosmai, Giuseppe Fanizza, Francesco Sylos Labini +2
We reply to the criticisms moved in [1] against our results presented in [2]. In particular, we show that our fractal model has none of the problems claimed in [1]. The latters can…