349 citations · 588 across the 21 of their papers we have counts for
23 papers
The Cosmological -shift
Carolina Figueiredo, Jiajie Mei, Yuyu Mo +1
We consider the extension of the -shift connecting Tr and pion amplitudes to observables in cosmology. We start in flat-space and explain how one can extract the pion wav…
All-Plus QED Wavefunctions in de Sitter Space
Song He, Jiajie Mei, Yuyu Mo
We present a compact all-multiplicity formula for tree-level late-time wavefunction coefficients of scalar QED in four-dimensional de Sitter space, with a conformally coupled charg…
A compact analytic formula for the one-loop triangle cosmological correlator
Johannes Henn, Jiajie Mei, Qinglin Yang
We derive a compact analytic formula for the one-loop triangle correlator of conformally coupled scalars in de Sitter space. The result is organised as six leading-singularity pref…
From Cosmological Cuts to Yang--Mills Wavefunctions in de Sitter Space
Song He, Jiajie Mei, Yuyu Mo
We study tree-level Yang--Mills wavefunctions in four-dimensional de Sitter space using their discontinuities. Cosmological cuts factorize gluon discontinuities into lower-point wa…
Beyond Discontinuities: Cosmological WFCs and the Supersymmetric Orthogonal Grassmannian
Yu-tin Huang, Chia-Kai Kuo, Yohan Liu +1
We construct an supersymmetric Grassmannian representation of tree-level wavefunction coefficients (WFCs) by combining Grassmannian representations of energy discont…
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…