183 citations · 2.1k across the 65 of their papers we have counts for
65 papers
Reconstruction methods and the amplification of the inflationary spectrum
Leonardo Chataignier, Alexander Yu. Kamenshchik, Alessandro Tronconi +1
We analyze the consequences of different evolutions of the Hubble parameter on the spectrum of scalar inflationary perturbations. The analysis is restricted to inflationary phases…
Reflected Waves and Quantum Gravity
Leonardo Chataignier, Alexander Yu. Kamenshchik, Alessandro Tronconi +1
In the context of canonical quantum gravity, we consider the effects of a non-standard expression for the gravitational wave function on the evolution of inflationary perturbations…
Regular black holes, universes without singularities, and phantom-scalar field transitions
Leonardo Chataignier, Alexander Yu. Kamenshchik, Alessandro Tronconi +1
We consider a procedure of elimination of cosmological singularities similar to that suggested in the recent paper by Simpson and Visser for the construction of regular black holes…
DBI Inflation and Warped Black Holes
Alexander Y. Kamenshchik, Alessandro Tronconi, Giovanni Venturi
We study a possible amplification mechanism for the curvature perturbations generated during inflation by a Dirac-Born-Infeld (DBI) inflaton in the presence of a sharp feature in t…
Born-Oppenheimer meets Wigner-Weyl in Quantum Gravity
A. Y. Kamenshchik, A. Tronconi, G. Venturi
Starting from a Born-Oppenheimer decomposition of the Wheeler-DeWitt equation for the quantum cosmology of the matter-gravity system, we have performed a Wigner-Weyl transformation…
The Born-Oppenheimer approach to Quantum Cosmology
A. Y. Kamenshchik, A. Tronconi, G. Venturi
The scope of this paper is to compare two different approaches for solving the Wheeler-DeWitt (WDW) equation in the presence of homogeneous matter (inflaton) and perturbations arou…