12 citations · 20 across the 5 of their papers we have counts for
5 papers
Cosmological horizons in regular bouncing backgrounds
M. Gasperini
It is often stated that a phase of standard, decelerated cosmological expansion is characterised by the absence of global event horizons, while a phase of accelerated expansion is…
On some properties of that strange component of Nature called "time"
Maurizio Gasperini
Are time-travels possible? is the past still existing? and is the future already existing? We try to give an answer to these an other questions concerning the properties of time an…
A simple example of "non-minimal" Pre-Big Bang scenario
PIetro Conzinu, Maurizio Gasperini, Eliseo Pavone
We give an example of non-minimal pre-big bang scenario able to produce the PTA signal considering a modified evolution of the high-curvature string phase, including the contributi…
Constraints on the Pre-Big Bang scenario from a cosmological interpretation of the NANOGrav data
P. Conzinu, G. Fanizza, M. Gasperini +3
We discuss a recently proposed fit of the 15-year data set obtained from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) in terms of a relic stochastic…
Gravitational-wave background in bouncing models from semi-classical, quantum and string gravity
Ido Ben-Dayan, Gianluca Calcagni, Maurizio Gasperini +4
We study the primordial spectra and the gravitational-wave background (GWB) of three models of semi-classical, quantum or string gravity where the big bang is replaced by a bounce…