423 citations · 5.5k across the 77 of their papers we have counts for
7 papers · 2 filters
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…
Records from the S-Matrix Marathon: A Timeless History of Time
Mang Hei Gordon Lee, Enrico Pajer, Mathieu Giroux +3
By directly probing the initial conditions of our universe, cosmological surveys offer us a unique observational handle on quantum field theory in curved spacetime with dynamical g…
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…
Cosmological cutting rules for Bogoliubov initial states
Diptimoy Ghosh, Enrico Pajer, Farman Ullah
The field theoretic wavefunction in cosmological spacetimes has received much attention as a fundamental object underlying the generation of primordial perturbations in our univers…
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…
The In-Out Formalism for In-In Correlators
Yaniv Donath, Enrico Pajer
Cosmological correlators, the natural observables of the primordial universe, have been extensively studied in the past two decades using the in-in formalism pioneered by Schwinger…
A Cosmological Tachyon Collider: Enhancing the Long-Short Scale Coupling
Ciaran McCulloch, Enrico Pajer, Xi Tong
The squeezed limit of the primordial curvature bispectrum is an extremely sensitive probe of new physics and encodes information about additional fields active during inflation suc…