4 citations · 4 across the 6 of their papers we have counts for
6 papers
Inflationary Bispectra and IR Physics from Quantum Simulators
Matthias Thomas Nowinski, Ivo Sachs
Bose-Einstein condensates have been used successfully as quantum simulators for early-universe particle production. Here we extend this analogy to the interacting theory. To this e…
Split Representations and Bubble Resummation for Massive de Sitter Correlators
Jonathan Gräfe, Ivo Sachs
We combine spectral- and split representations to factorize multi-loop momentum space diagrams, in the Schwinger-Keldysh formulation for cosmological correlators, with massive scal…
Cosmological Correlator Discontinuities from Scattering Amplitudes
Chandramouli Chowdhury, Sadra Jazayeri, Arthur Lipstein +3
Recent theoretical work has revealed that basic observables of quantum field theory in de Sitter space, known as in-in or cosmological correlators, exhibit surprisingly simple math…
Resummation of Cosmological Correlators and their UV-Regularization
Matthias Nowinski, Ivo Sachs
Cosmological correlators are important observables in cosmology. They are often approximated by de Sitter space correlators. In this paper, we give a first precise diagrammatical c…
Cosmological Dressing Rules
Chandramouli Chowdhury, Arthur Lipstein, Joe Marshall +2
The basic observables in cosmology are known as in-in correlators. Recent calculations have revealed that in-in correlators in four dimensional de Sitter space exhibit hidden simpl…
The Subtle Simplicity of Cosmological Correlators
Chandramouli Chowdhury, Arthur Lipstein, Jiajie Mei +2
We investigate cosmological correlators for conformally coupled theory in four-dimensional de Sitter space. These \textit{in-in} correlators differ from scattering amplitudes…