156 citations · 1.3k across the 28 of their papers we have counts for
28 papers
Perturbative Unitarity and the Wavefunction of the Universe
Soner Albayrak, Paolo Benincasa, Carlos Duaso Pueyo
Unitarity of time evolution is one of the basic principles constraining physical processes. Its consequences in the perturbative Bunch-Davies wavefunction in cosmology have been fo…
Wavefunctionals/S-matrix techniques in de Sitter
Paolo Benincasa
Flat-space physics is highly constrained by basic principles such as Lorentz invariance, locality, unitarity and causality. This is neatly seen in the structure of scattering ampli…
Amplitudes meet Cosmology: A (Scalar) Primer
Paolo Benincasa
We review the most recent progress in our understanding of quantum mechanical observables in cosmology in the perturbative regime. It relies on an approach that considers them dire…
Physical Representations for Scattering Amplitudes and the Wavefunction of the Universe
Paolo Benincasa, William J. Torres Bobadilla
The way we organise perturbation theory is of fundamental importance both for computing the observables of relevance and for extracting fundamental physics out of them. If on one h…
Steinmann Relations and the Wavefunction of the Universe
Paolo Benincasa, Andrew J. McLeod, Cristian Vergu
The physical principles of causality and unitarity put strong constraints on the analytic structure of the flat-space S-matrix. In particular, these principles give rise to the Ste…
Cosmological Polytopes and the Wavefuncton of the Universe for Light States
Paolo Benincasa
We extend the investigation of the structure of the late-time wavefunction of the universe to a class of toy models of scalars with time-dependent masses and polynomial couplings,…