44 citations · 44 across the 1 of their papers we have counts for
5 papers
Unitarity of quantum-gravitational corrections to primordial fluctuations in the Born-Oppenheimer approach
Leonardo Chataignier, Manuel Kraemer
We revisit the calculation of quantum-gravitational corrections to the power spectra of scalar and tensor perturbations in the Born-Oppenheimer approach to quantum gravity. We focu…
Relational observables, reference frames, and conditional probabilities
Leonardo Chataignier
We discuss the construction of relational observables in time-reparametrization invariant quantum mechanics and we argue that their physical interpretation can be understood in ter…
Construction of quantum Dirac observables and the emergence of WKB time
Leonardo Chataignier
We describe a method of construction of gauge-invariant operators (Dirac observables or ``evolving constants of motion'') from the knowledge of the eigenstates of the gauge generat…
Gauge Fixing and the Semiclassical Interpretation of Quantum Cosmology
Leonardo Chataignier
We make a critical review of the semiclassical interpretation of quantum cosmology and emphasise that it is not necessary to consider that a concept of time emerges only when the g…
Systematic analysis of radiative symmetry breaking in models with extended scalar sector
Leonardo Chataignier, Tomislav Prokopec, Michael G. Schmidt +1
Radiative symmetry breaking (RSB) is a theoretically appealing framework for the generation of mass scales through quantum effects. It can be successfully implemented in models wit…