323 citations · 1.6k across the 22 of their papers we have counts for
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Analogue Models for Emergent Gravity
Stefano Liberati, Florian Girelli, Lorenzo Sindoni
Gravity stands out among the fundamental interactions because of its apparent incompatibility with having a quantum description. Moreover, thermodynamic aspects of gravitation theo…
Fate of gravitational collapse in semiclassical gravity
Carlos Barcelo, Stefano Liberati, Sebastiano Sonego +1
While the outcome of gravitational collapse in classical general relativity is unquestionably a black hole, up to now no full and complete semiclassical description of black hole f…
Quantum gravity phenomenology via Lorentz violations
S. Liberati
The search for a quantum theory of gravity has been one of the main aims of theoretical physics for many years by now. However the efforts in this direction have been often hampere…
Reply to "Can gravitational dynamics be obtained by diffeomorphism invariance of action?"
Thomas P. Sotiriou, Stefano Liberati
In a previous work we showed that, in a suitable setting, one can use diffeomorphism invariance in order to derive gravitational field equations from boundary terms of the gravitat…
Comments on ``Improved limit on quantum-spacetime modifications of Lorentz symmetry from observations of gamma-ray blazars"
T. Jacobson, S. Liberati, D. Mattingly
We address several criticisms by Amelino-Camelia of our recent analyses of two observational constraints on Lorentz violation at order E/M_{Planck}. In particular, we emphasize the…
Bi-refringence versus bi-metricity
Matt Visser, Carlos Barcelo, Stefano Liberati
In this article we carefully distinguish the notion of bi-refringence (a polarization-dependent doubling in photon propagation speeds) from that of bi-metricity (where the two phot…