4 papers
Analytical approximations for curved primordial tensor spectra
Ezra Msolla, Ayngaran Thavanesan
We build upon previous analytical treatments of scalar perturbations in curved inflationary universes to obtain analytical templates for the primordial tensor power spectrum in mod…
Holographic Cosmology at Finite Time
Goncalo Araujo-Regado, Ayngaran Thavanesan, Aron C. Wall
We investigate Cauchy Slice Holography in de Sitter spacetime. By performing a deformation of a (bottom-up) dS/CFT model, we obtain a holographic theory living on flat Cauchy…
Kosmic Field Theories: Towards Holographic Duals for Unitary String Cosmologies
Ayngaran Thavanesan, Aron C. Wall
Recent work on cosmological amplitudes has established reality conditions (derived from unitarity) for general particle-creation processes in flat FLRW cosmologies, in the Bunch-Da…
No-go Theorem for Cosmological Parity Violation
Ayngaran Thavanesan
A no-go theorem for parity-violation in even -dimensional spacetimes invariant under and dilatations (as well as the implications for odd ) is derived. For the case…