Correlators from graphical amplitudes
Year: 2025
Type: article
Abstract: Recently, the wavefunction coefficients for conformally coupled scalars in an Friedmann-Robertson-Walker cosmology have been presented as a sum over amplitudelike functions known as . In this work, we extend this analysis to full . Remarkably, the amplitube expansion of the correlator exhibits many vanishing contributions that are otherwise present in the expansion of the wavefunction. Moreover, while the wavefunction coefficients suffer from relative minus signs between terms, the surviving terms in thte correlation function do not. These observations point to a hidden simplicity in the structure of the correlation function compared to that of the wavefunction coefficient.
DOI: 10.1103/cg2r-gtkt
Author: Ross Glew
Institution: University of Hertfordshire
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4414626349