140 citations · 140 across the 2 of their papers we have counts for
7 papers · 1 filter
Cosmological Cutting Rules
Scott Melville, Enrico Pajer
Primordial perturbations in our universe are believed to have a quantum origin, and can be described by the wavefunction of the universe (or equivalently, cosmological correlators)…
Unitary and Analytic Renormalisation of Cosmological Correlators
Diksha Jain, Enrico Pajer, Xi Tong
Loop contributions to cosmological correlators and to the associated wavefunction are of key theoretical and phenomenological interest. Here, we investigate and compare different r…
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…
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…
An Open Effective Field Theory for light in a medium
Santiago Agui Salcedo, Thomas Colas, Enrico Pajer
In many scenarios of interest, a quantum system interacts with an unknown environment, necessitating the use of open quantum system methods to capture dissipative effects and envir…
The Open Effective Field Theory of Inflation
Santiago Agui Salcedo, Thomas Colas, Enrico Pajer
In our quest to understand the generation of cosmological perturbations, we face two serious obstacles: we do not have direct information about the environment experienced by primo…