12 papers
LISA as a probe of pre-big-bang physics: a nested sampling analysis
Xoán Vilas Currás, Gianluca Calcagni
Using a nested sampling analysis, we study the gravitational-wave background (GWB) predicted by the Gasperini--Veneziano model of pre-big-bang cosmology, both in its most recent mi…
Cosmology of fractional gravity
Iván Salvador-GarcÃa, Gianluca Calcagni
This is a first study of the cosmology of classical fractional gravity, a nonlocal proposal endowed with self-adjoint fractional d'Alembertian operators which serves as the basis f…
Hawking area law in quantum gravity
Gianluca Calcagni
We show that the LIGO--Virgo--KAGRA verification of Hawking area law carries profound consequences for quantum gravity if such a law is postulated to hold exactly. The observed mer…
Perturbative unitarity of fractional field theories and gravity
Gianluca Calcagni, Fabio Briscese
Motivated by quantum gravity on spacetimes with multi-scale geometry, we analyze quantum field theories with a self-adjoint fractional power of the d'Alem\-bert\-…
Fractal universe and quantum gravity made simple
Fabio Briscese, Gianluca Calcagni
Quantum field theory (QFT) on fractal spacetimes is a program aiming at quantizing the gravitational interaction consistently at all energy scales thanks to an intrinsically or dyn…
Fate of false vacuum in non-perturbative regimes: Gravity effects
Gianluca Calcagni, Marco Frasca, Anish Ghoshal
A recent analysis of the false-vacuum decay in non-perturbative regimes is here extended in the presence of Einstein gravity, computing the corresponding effective potential and de…