53 citations · 579 across the 48 of their papers we have counts for
3 papers · 1 filter
Ambiguous power spectrum from a quantum bounce
Jaime de Cabo Martin, Przemysław Małkiewicz, Patrick Peter
A quantum cosmological bouncing model may exhibit an ambiguity stemming from the nonclassical nature of the background evolution: two classically equivalent theories can produce tw…
Gauge-fixing and spacetime reconstruction in the Hamiltonian theory of cosmological perturbations
Alice Boldrin, Przemysław Małkiewicz
We develop a complete Hamiltonian approach to the theory of perturbations around any spatially homogeneous spacetime. We employ the Dirac method for constrained systems which is we…
Clocks and trajectories in quantum cosmology
Przemysław Małkiewicz, Patrick Peter, S. D. P. Vitenti
We consider a simple cosmological model consisting of an empty Bianchi I Universe, whose Hamiltonian we deparametrise to provide a natural clock variable. The model thus effectivel…