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A minimal length versus the Unruh effect
Piero Nicolini, Massimiliano Rinaldi
In this Letter we study the radiation measured by an accelerated detector, coupled to a scalar field, in the presence of a fundamental minimal length. The latter is implemented by…
A new approach to non-commutative inflation
Massimiliano Rinaldi
We propose an inflationary scenario inspired by a recent formulation, in terms of coherent states, of non-commutative quantum field theory. We consider the semiclassical Einstein e…
On Adiabatic Renormalization of Inflationary Perturbations
Ruth Durrer, Giovanni Marozzi, Massimiliano Rinaldi
We discuss the impact of adiabatic renormalization on the power spectrum of scalar and tensor perturbations from inflation. We show that adiabatic regularization is ambiguous as it…
Graviton production in non-inflationary cosmology
Ruth Durrer, Massimiliano Rinaldi
We discuss the creation of massless particles in a Universe, which transits from a radiation-dominated era to any other expansion law. We calculate in detail the generation of grav…