312 citations · 1.1k across the 21 of their papers we have counts for
6 papers · 2 filters
Confronting the trans-Planckian question of inflationary cosmology with dissipative effects
Renaud Parentani
We provide a class of QFTs which exhibit dissipation above a threshold energy, thereby breaking Lorentz invariance. Unitarity is preserved by coupling the fields to additional degr…
Hawking radiation from extremal and non-extremal black holes
R. Balbinot, A. Fabbri, S. Farese +1
The relationship between Hawking radiation emitted by non extremal and extremal Reissner Nordstrom black holes is critically analyzed. A careful study of a series of regular collap…
Constructing QFT's wherein Lorentz Invariance is broken by dissipative effects in the UV
Renaud Parentani
There has been a recent interest in considering Quantum Field Theories in which Lorentz Invariance is broken in the UV sector. However attention has been mostly limited to dispersi…
Damped Corrections to Inflationary Spectra from a Fluctuating Cutoff
David Campo, Jens Niemeyer, Renaud Parentani
We reconsider trans-Planckian corrections to inflationary spectra by taking into account a physical effect which has been overlooked and which could have important consequences. We…
Beyond the semi-classical description of black hole evaporation
Renaud Parentani
In the semi-classical treatment, i.e. in a classical black hole geometry, Hawking quanta emerge from trans-Planckian configurations because of scale invariance. There is indeed no…
Black hole entanglement entropy regularized in a freely falling frame
Ted Jacobson, Renaud Parentani
We compute the black hole horizon entanglement entropy S_E for a massless scalar field, first with a hard cutoff and then with high frequency dispersion, both imposed in a frame th…