724 citations · 5.8k across the 123 of their papers we have counts for
124 papers
Integrable models of inflation beyond slow-roll
M. Bianchi, G. Dibitetto, J. F. Morales +1
We propose a novel analytic approach to the study of multi-component FLRW cosmologies and their perturbations. The dynamics is triggered by a single scalar field with a scalar pote…
A Rutherford-like formula for scattering off Kerr-Newman BHs and subleading corrections
Massimo Bianchi, Claudio Gambino, Fabio Riccioni
By exploiting the Kerr-Schild gauge, we study the scattering of a massive (charged) scalar off a Kerr-Newman black hole. In this gauge, the interactions between the probe and the t…
On the stability and deformability of top stars
Massimo Bianchi, Giorgio Di Russo, Alfredo Grillo +2
Topological stars, or top stars for brevity, are smooth horizonless static solutions of Einstein-Maxwell theory in 5-d that reduce to spherically symmetric solutions of Einstein-Ma…
Charge instability of JMaRT geometries
Massimo Bianchi, Carlo Di Benedetto, Giorgio Di Russo +1
We perform a detailed study of linear perturbations of the JMaRT family of non-BPS smooth horizonless solutions of type IIB supergravity beyond the near-decoupling limit. In additi…
Measuring chaos in string scattering processes
Massimo Bianchi, Maurizio Firrotta, Jacob Sonnenschein +1
We analyze the amplitudes of one highly excited string (HES) state with two or three tachyons in open bosonic string theory. We argue that these processes are chaotic by showing th…
2-charge circular fuzz-balls and their perturbations
Massimo Bianchi, Giorgio Di Russo
We perform a detailed study of perturbations around 2-charge circular fuzz-balls and compare the results with the ones obtained in the case of 'small' BHs. In addition to the photo…