7 papers
Probing Cosmic Expansion and Early Universe with Einstein Telescope
Angelo Ricciardone, Mairi Sakellariadou, Archisman Ghosh +52
Over the next two decades, gravitational-wave (GW) observations are expected to evolve from a discovery-driven endeavour into a precision tool for astrophysics, cosmology, and fund…
Bayesian reconstruction of primordial perturbations from induced gravitational waves
Aya Ghaleb, Ameek Malhotra, Gianmassimo Tasinato +1
The formation of primordial black holes or other dark matter relics from amplified density fluctuations in the early universe may also generate scalar-induced gravitational waves (…
Astrometry meets Pulsar Timing Arrays: Synergies for Gravitational Wave Detection
N. M. Jiménez Cruz, Ameek Malhotra, Gianmassimo Tasinato +1
High-precision astrometry offers a promising approach to detect low-frequency gravitational waves, complementing pulsar timing array (PTA) observations. We explore the response of…
Stückelberg path to pure de Sitter supergravity
SukÅti Bansal, Silvia Nagy, Antonio Padilla +1
We advance the study of pure de Sitter supergravity by introducing a finite formulation of unimodular supergravity via the super-Stückelberg mechanism. Building on previous works,…
Reconstructing Primordial Curvature Perturbations via Scalar-Induced Gravitational Waves with LISA
Jonas El Gammal, Aya Ghaleb, Gabriele Franciolini +17
Many early universe scenarios predict an enhancement of scalar perturbations at scales currently unconstrained by cosmological probes. These perturbations source gravitational wave…
Cosmological tests of quintessence in quantum gravity
Sukannya Bhattacharya, Giulia Borghetto, Ameek Malhotra +3
We use a suite of the most recent cosmological observations to test models of dynamical dark energy motivated by quantum gravity. Specifically, we focus on hilltop quintessence sce…