73 citations · 266 across the 14 of their papers we have counts for
15 papers
Lattice Monte Carlo of on Euclidean de Sitter
Angelo Caravano
We report the first Monte Carlo simulation of quantum field theory on Euclidean de Sitter space, . Rather than discretizing space, we use a spectral lattice based on spherical…
Ab Initio Cosmological Simulations: From Inflation to Present-Day Structure Formation
Drew Jamieson, Angelo Caravano, Eiichiro Komatsu
The cosmic web preserves a record of the physics that shaped the universe in its earliest moments, the period of exponential expansion known as cosmic inflation. However, if inflat…
Lattice simulations of scalar-induced gravitational waves from inflation
Angelo Caravano, Gabriele Franciolini, Sébastien Renaux-Petel
Scalar-induced gravitational waves (SIGWs) provide a powerful probe of inflationary dynamics on scales far smaller than those accessible to the cosmic microwave background and larg…
Primordial Power Spectrum and Bispectrum from Lattice Simulations of Axion-U(1) Inflation
Drew Jamieson, Angelo Caravano, Eiichiro Komatsu
We present primordial non-Gaussianity predictions from a new high-precision code for simulating axion-U(1) inflation on a discrete lattice. We measure the primordial scalar curvatu…
InflationEasy: A C++ Lattice Code for Inflation
Angelo Caravano
InflationEasy is a lattice code specifically developed for cosmological inflation. It simulates the nonlinear dynamics of a scalar field on a three-dimensional lattice in an expand…
Ultra-Slow-Roll Inflation on the Lattice II: Nonperturbative Curvature Perturbation
Angelo Caravano, Gabriele Franciolini, Sébastien Renaux-Petel
Building on the recent lattice simulations of ultra-slow-roll (USR) dynamics presented in arXiv:2410.23942, we investigate the role of the nonlinear relation between the inflaton f…
Ultra-Slow-Roll Inflation on the Lattice I: Backreaction and Nonlinear Effects
Angelo Caravano, Gabriele Franciolini, Sébastien Renaux-Petel
Violating the slow-roll regime during the final stages of inflation can significantly enhance curvature perturbations, a scenario often invoked in models producing primordial black…
Parity-Odd Power Spectra: Concise Statistics for Cosmological Parity Violation
Drew Jamieson, Angelo Caravano, Jiamin Hou +2
We introduce the Parity-Odd Power (POP) spectra, a novel set of observables for probing parity violation in cosmological -point statistics. POP spectra are derived from composit…
Unveiling the nonlinear dynamics of a rolling axion during inflation
Angelo Caravano, Marco Peloso
A spectator axion-gauge sector, minimally coupled to the inflaton, with the axion experiencing a momentary stage of fast roll during cosmological inflation, can generate unique sig…
Inflationary Butterfly Effect: Non-perturbative Dynamics From Small-Scale Features
Angelo Caravano, Keisuke Inomata, Sébastien Renaux-Petel
For the first time, we investigate the non-perturbative dynamics of single field inflation with a departure from slow-roll. Using simulations, we find that oscillatory features in…
Simulating the inflationary Universe: from single-field to the axion-U(1) model
Angelo Caravano
We present a nonlinear study of the inflationary epoch based on numerical lattice simulations. Lattice simulations are a well-known tool in primordial cosmology, and they have been…
Lattice Simulations of Axion-U(1) Inflation
Angelo Caravano, Eiichiro Komatsu, Kaloian D. Lozanov +1
We present the first nonlinear lattice simulation of an axion field coupled to a U(1) gauge field during inflation. We use it to fully characterize the statistics of the primordial…
Lattice simulations of Abelian gauge fields coupled to axions during Inflation
Angelo Caravano, Eiichiro Komatsu, Kaloian D. Lozanov +1
We use a lattice simulation to study a model of axion inflation where the inflaton is coupled to a U(1) gauge field through Chern-Simons interaction. These kinds of models have alr…
Lattice Simulations of Inflation
Angelo Caravano, Eiichiro Komatsu, Kaloian D. Lozanov +1
The scalar field theory of cosmological inflation constitutes nowadays one of the preferred scenarios for the physics of the early universe. In this paper we aim at studying the in…
Combining cosmological and local bounds on bimetric theory
Angelo Caravano, Marvin Lüben, Jochen Weller
Ghost-free bimetric theory describes two nonlinearly interacting spin-2 fields, one massive and one massless, thus extending general relativity. We confront bimetric theory with ob…