3 papers
hep-th2026
All-Loop Renormalization and the Phase of the de Sitter Wavefunction
Alexander Farren, Ciaran McCulloch, Enrico Pajer +1
Cosmological observables of the primordial universe are encoded in the late-time field-theoretic wavefunction. For shift-symmetric scalars in de Sitter, a good approximation for ma…
hep-th2026
On the Asymptotic Nature of Cosmological Effective Theories
Carlos Duaso Pueyo, Harry Goodhew, Ciaran McCulloch +1
Much of our intuition about Effective Field Theories (EFTs) stems from their formulation in flat spacetime, yet EFTs have become indispensable tools in cosmology, where time-depend…
hep-th2025
Perturbative unitarity bounds from momentum-space entanglement
Carlos Duaso Pueyo, Harry Goodhew, Ciaran McCulloch +1
Physical theories have a limited regime of validity and hence must be accompanied by a breakdown diagnostic to establish when they cease to be valid as parameters are varied. For p…