4 citations · 10 across the 7 of their papers we have counts for
7 papers
Two Fluid Quantum Bouncing Cosmology I: Theoretical Model
Sandro D. P. Vitenti, Nelson Pinto-Neto, Patrick Peter +1
Bouncing cosmologies offer an alternative to inflation by resolving the initial singularity through a contracting phase followed by a bounce into expansion. In many such models, th…
Quantum cosmological background superposition and perturbation predictions
Kratika Mazde, Lisa Mickel, Patrick Peter
Predictions from early universe cosmology typically concern primordial perturbations generated during epochs where effects arising from the quantum nature of gravity may be importa…
Non-Gaussianities as a Signature of Quantumness of Quantum Cosmology
Hervé Bergeron, Przemysław Małkiewicz, Patrick Peter
We show that the consistent application of the rules of quantum mechanics to cosmological systems inevitably results in the so-called multiverse states in which neither the backgro…
Quantum entanglement and non-Gaussianity in the primordial Universe
Herve Bergeron, Przemyslaw Malkiewicz, Patrick Peter
We propose a new method to investigate signatures of a quantum gravity phase in the primordial state of cosmological perturbations. We formulate and study a quantum model of a pert…
Time problem in primordial perturbations
Alice Boldrin, Przemysław Małkiewicz, Patrick Peter
We study the non-unitary relation between quantum gravitational models defined using different internal times. We show that despite the non-unitarity, it is possible to provide a p…
A new class of exact coherent states: enhanced quantization of motion on the half-line
Hervé Bergeron, Jean-Pierre Gazeau, Przemysław Małkiewicz +1
We have discovered a class of dynamically stable coherent states for motion on the half-line. The regularization of the half-line boundary and the consequent quantum motion are exp…
Cosmological Perturbation Theory
Patrick Peter
A short pedagogical overview of cosmological perturbation theory, following the lectures given during the brazilian school of cosmology held in August 2012. Topics treated are: I.…