From the 1 of 6 linked papers with an AI index.
6 papers
Superconductive or superfluid condensation in curved spacetime
Leonardo Modesto
The paper shows that quantum field theory in any curved spacetime remains unitary by expressing Bogoliubov transformations as a unitary squeezing operator, leading to vacuum states…
Taming singularities and chaos in conformal gravity
Jiale Gu, Leonardo Modesto, Cosimo Bambi
We hereby address the cosmological singularity problem in a general gravitational theory invariant under Weyl conformal transformations. In particular, we focus on the Bianchi IX s…
Do Black Holes Exist?
Leonardo Modesto, Edoardo Rattu
We carefully investigate, extend, and shed new light on the McVittie exact solution of Einstein's gravity (EG) with the focus on the implications in the Universe we live in. It tur…
A Quantum Superposition of Black Hole Evaporation Histories: Recovering Unitarity
Ali Akil, Lorenzo Giannelli, Leonardo Modesto +3
Black hole evaporation is one of the most striking phenomena at the interface between gravity and quantum physics. In Hawking's semi-classical treatment, where matter is quantum me…
Conformalons: a new class of black hole mimickers
Leonardo Modesto, Ali Akil, Cosimo Bambi
In any conformally invariant gravitational theory, the space of exact solutions is greatly enlarged. Therefore, we cannot exclude the Weyl's conformal invariance to be spontaneousl…
Testing quantum gravity with primordial gravitational waves
Gianluca Calcagni, Leonardo Modesto
We propose a testable alternative to inflation directly built in a very general class of ultraviolet complete theories of quantum gravity enjoying Weyl invariance. After the latter…