6 papers
Minimum lifetime of a black hole
Eugenio Bianchi, Matthew Brandsema, Kenneth Czuprynski +1
We derive bounds on the lifetime of an evaporating black hole. The bound follows from energy conservation and purification, within the framework of `asymptotically semiclassical sp…
Toller matrices and the Feynman in spinfoams
Eugenio Bianchi, Chaosong Chen, Mauricio Gamonal
We study the analytic properties and three equivalent representations of the Toller matrices which appear in the causal formulation of spinfoam transition amplitudes fo…
On Radiative Fluxes and Coulombic Charges in the Balance Law for Black Hole Evaporation
Eugenio Bianchi, Daniel E. Paraizo
In asymptotically-flat spacetimes, there is a clear distinction between radiative fluxes and Coulombic charges, and their relation is encoded in balance laws. In this paper, we fir…
Causal spinfoam vertex for 4d Lorentzian quantum gravity
Eugenio Bianchi, Chaosong Chen, Mauricio Gamonal
We introduce a new causal spinfoam vertex for d Lorentzian quantum gravity. The causal data are encoded in Toller -matrices, which add to Wigner -matrices $T^{(+)}+T^{(-)}…
Precision predictions of Starobinsky inflation with self-consistent Weyl-squared corrections
Eugenio Bianchi, Mauricio Gamonal
Starobinsky's inflation provides a compelling one-parameter inflationary model that is supported by current cosmological observations. However, at the same order in space…
Squeezed vacua and primordial features in effective theories of inflation at N2LO
Eugenio Bianchi, Mauricio Gamonal
A finite duration of cosmic inflation can result in features in the…