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A diagrammatic approach to the spectrum of cosmological perturbations

G. De Risi·M. Gasperini
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Abstract

We compute the spectral distribution of the quantum fluctuations of the vacuum, amplified by inflation, after an arbitrary number of background transitions. Using a graphic representation of the process we find that the final spectrum can be completely determined trough a synthetic set of working rules, and a list of simple algebraic computations.

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G. De Risi, M. Gasperini. 2001-01-30. A diagrammatic approach to the spectrum of cosmological perturbations. https://doi.org/10.1016/s0370-2693(01)00220-9

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