451 citations · 1.8k across the 15 of their papers we have counts for
13 papers
Gauge invariant averages for the cosmological backreaction
M. Gasperini, G. Marozzi, G. Veneziano
We show how to provide suitable gauge invariant prescriptions for the classical spatial averages (resp. quantum expectation values) that are needed in the evaluation of classical (…
Relic gravitons on Kasner-like branes
M. Cavaglia', G. De Risi, M. Gasperini
We discuss the cosmological amplification of tensor perturbations in a simple example of brane-world scenario, in which massless gravitons are localized on a higher-dimensional Kas…
Perturbations in a non-singular bouncing Universe
M. Gasperini, M. Giovannini, G. Veneziano
We complement the low-energy gravi-dilaton effective action of string theory with a non-local, general-covariant dilaton potential, and obtain homogeneous solutions describing a no…
Quintessence as a run-away dilaton
M. Gasperini, F. Piazza, G. Veneziano
We consider a late-time cosmological model based on a recent proposal that the infinite-bare-coupling limit of superstring/M-theory exists and has good phenomenological properties,…
String cosmology versus standard and inflationary cosmology
M. Gasperini
This paper presents a review of the basic, model-independent differences between the pre-big bang scenario, arising naturally in a string cosmology context, and the standard inflat…
Low-energy quantum string cosmology
M. Gasperini
We introduce a Wheeler-De Witt approach to quantum cosmology based on the low-energy string effective action, with an effective dilaton potential included to account for non-pertur…