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pro vyhledávání: '"Renaux A"'
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 holes and small-scale scalar induced gravitational waves. When pertur
Externí odkaz:
http://arxiv.org/abs/2410.23942
The joint detection and tracking of a moving target embedded in an unknown disturbance represents a key feature that motivates the development of the cognitive radar paradigm. Building upon recent advancements in robust target detection with multiple
Externí odkaz:
http://arxiv.org/abs/2410.17967
Autor:
Braglia, Matteo, Calcagni, Gianluca, Franciolini, Gabriele, Fumagalli, Jacopo, Nardini, Germano, Peloso, Marco, Pieroni, Mauro, Renaux-Petel, Sébastien, Ricciardone, Angelo, Tasinato, Gianmassimo, Vaskonen, Ville
Various scenarios of cosmic inflation enhance the amplitude of the stochastic gravitational wave background (SGWB) at frequencies detectable by the LISA detector. We develop tools for a template-based analysis of the SGWB and introduce a template dat
Externí odkaz:
http://arxiv.org/abs/2407.04356
The ability to detect unfamiliar or unexpected images is essential for safe deployment of computer vision systems. In the context of classification, the task of detecting images outside of a model's training domain is known as out-of-distribution (OO
Externí odkaz:
http://arxiv.org/abs/2404.01775
Publikováno v:
Phys.Rev.Lett. 133 (2024) 15, 151001
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 the potential can drastically alter the course of inflation, with majo
Externí odkaz:
http://arxiv.org/abs/2403.12811
Publikováno v:
Class. Quantum Grav. 41 175015 (2024)
Cosmological correlators hold the key to high-energy physics as they probe the earliest moments of our Universe, and conceal hidden mathematical structures. However, even at tree-level, perturbative calculations are limited by technical difficulties
Externí odkaz:
http://arxiv.org/abs/2402.03693
We study the statistics of scalar perturbations in models of inflation with small and rapid oscillations in the inflaton potential (resonant non-Gaussianity). We do so by deriving the wavefunction $\Psi[\zeta(\boldsymbol{x})]$ non-perturbatively in $
Externí odkaz:
http://arxiv.org/abs/2401.10212
The time evolution of primordial fluctuations conceals a wealth of insights into the high-energy physics at play during the earliest moments of our Universe, which is ultimately encoded in late-time spatial correlation functions. However, the convent
Externí odkaz:
http://arxiv.org/abs/2312.06559
This paper presents a new performance bound for estimation problems where the parameter to estimate lies in a Riemannian manifold (a smooth manifold endowed with a Riemannian metric) and follows a given prior distribution. In this setup, the chosen R
Externí odkaz:
http://arxiv.org/abs/2311.04748
Autor:
Bagui, Eleni, Clesse, Sebastien, De Luca, Valerio, Ezquiaga, Jose María, Franciolini, Gabriele, García-Bellido, Juan, Joana, Cristian, Jain, Rajeev Kumar, Kuroyanagi, Sachiko, Musco, Ilia, Papanikolaou, Theodoros, Raccanelli, Alvise, Renaux-Petel, Sébastien, Riotto, Antonio, Morales, Ester Ruiz, Scalisi, Marco, Sergijenko, Olga, Unal, Caner, Vennin, Vincent, Wands, David
In the recent years, primordial black holes (PBHs) have emerged as one of the most interesting and hotly debated topics in cosmology. Among other possibilities, PBHs could explain both some of the signals from binary black hole mergers observed in gr
Externí odkaz:
http://arxiv.org/abs/2310.19857