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hep-th2026
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…
hep-th2026
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…
hep-th2026
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…