Publications (9)
Quantum Corrections to the Stochastic Gravitational Wave Background
Denis Comelli, Maicol Di Giambattista, Luigi Pilo +1
We study 1-loop corrections to the primordial stochastic background of gravitational waves produced during inflation. While in single-clock, at the leading order in slow-roll, quan…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
Primordial Non-Gaussianity in Supersolid Inflation
Marco Celoria, Denis Comelli, Luigi Pilo +1
We study primordial non-gaussianity in supersolid inflation. The dynamics of supersolid is formulated in terms of an effective field theory based on four scalar fields with a shift…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Resilience of long modes in cosmological observables
Sabino Matarrese, Luigi Pilo, Rocco Rollo
By a careful implementation of gauge transformations involving long-wavelength modes, we show that a variety of effects involving squeezed bispectrum configurations, for which one…
Adiabatic Media Inflation
Marco Celoria, Denis Comelli, Luigi Pilo +1
We study the dynamics of inflation driven by an adiabatic self-gravitating medium, extending the previous works on fluid and solid inflation. Such a class of media comprises perfec…
Boosting GWs in Supersolid Inflation
Marco Celoria, Denis Comelli, Luigi Pilo +1
Inflation driven by a generic self-gravitating medium is an interesting alternative to study the impact of spontaneous spacetime symmetry breaking during a quasi de-Sitter phase, i…
The Physical Content of Long Tensor Modes in Cosmology
Nicola Bartolo, Giovanni Battista Carollo, Sabino Matarrese +2
We analyze the physical content of squeezed bispectra involving long-wavelength tensor perturbations, showing that these modes cannot be gauged away, except for the exact (unphysic…
Formalism and Conserved Currents in Cosmology
Sabino Matarrese, Luigi Pilo, Rocco Rollo
The formalism, based on the counting of the number of e-folds during inflation in different local patches of the Universe, has been introduced several years ago as a simple a…