31 citations · 144 across the 18 of their papers we have counts for
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Hawking radiation with dispersion: reconciling the Bogoliubov and tunneling approaches
Francesco Del Porro, Stefano Liberati, Marc Schneider
We investigate Hawking-like particle production in analogue gravity systems with superluminal modified dispersion relations. For a broad class of even, convex, and polynomially bou…
On the Resilience of Black Hole Evaporation: Gravitational Tunneling through Universal Horizons
M. Schneider, F. Del Porro, M. Herrero-Valea +1
Using a quantum tunneling derivation, we show the resilience of Hawking radiation in Lorentz violating gravity. In particular, we show that the standard derivation of the Hawking e…
Gravitational Tunneling in Lorentz Violating Gravity
F. Del Porro, M. Herrero-Valea, S. Liberati +1
Black holes in Lorentz violating gravity, such as Einstein--Aether or Horava--Lifshitz Gravity, are drastically different from their general relativistic siblings. Although they al…
Space-like Singularities of General Relativity: A Phantom menace?
Abhay Ashtekar, Adrián del Río, Marc Schneider
The big bang and the Schwarzschild singularities are space-like. They are generally regarded as the "final frontiers" at which space-time ends and general relativity breaks down. W…
Time Orientability and Particle Production from Universal Horizons
Francesco Del Porro, Mario Herrero-Valea, Stefano Liberati +1
We discuss particle production in spacetimes endowed with a universal horizon in Einstein--Aether and Horava gravity. We argue that continuity and differentiability of the lapse fu…
Probing the Big Bang with quantum fields
Abhay Ashtekar, Tommaso De Lorenzo, Marc Schneider
By carrying out a systematic investigation of linear, test quantum fields in cosmological space-times, we show that remain well-defined across the big bang as…