2024
DOI: 10.1007/jhep12(2024)042
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Cosmological amplitudes in power-law FRW universe

Bingchu Fan,
Zhong-Zhi Xianyu

Abstract: The correlators of large-scale fluctuations belong to the most important observables in modern cosmology. Recently, there have been considerable efforts in analytically understanding the cosmological correlators and the related wavefunction coefficients, which we collectively call cosmological amplitudes. In this work, we provide a set of simple rules to directly write down analytical answers for arbitrary tree-level amplitudes of conformal scalars with time-dependent interactions in power-law FRW universe. Wi… Show more

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