312 citations · 588 across the 12 of their papers we have counts for
8 papers · 1 filter
Decoherence and entropy of primordial fluctuations. I: Formalism and interpretation
David Campo, Renaud Parentani
We propose an operational definition of the entropy of cosmological perturbations based on a truncation of the hierarchy of Green functions. The value of the entropy is unambiguous…
Decoherence and entropy of primordial fluctuations II. The entropy budget
David Campo, Renaud Parentani
We calculate the entropy of adiabatic perturbations associated with a truncation of the hierarchy of Green functions at the first non trivial level, i.e. in a self-consistent Gauss…
Signatures of trans-Planckian dispersion in inflationary spectra
Jean Macher, Renaud Parentani
The primordial spectra are calculated using dispersion relations which deviate from the relativistic one above a certain energy scale Lambda. We determine the properties of the lea…
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…
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…