Quantum contributions to cosmological correlations. II. Can these corrections become large
By S. Weinberg. 2006
255 citations recorded by the source corpus.
This is a sequel to a previous detailed study of quantum corrections to cosmological correlations. It was found there that except in special cases these corrections depend on the whole history of inflation, not just on the behavior of fields at horizon exit. It is shown here that at least in perturbation theory these corrections can nevertheless not be proportional to positive powers of the Robertson--Walker scale factor, but only at most to powers of its logarithm, and are therefore never large.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/20e1fe996f769bfb8b4e2ff7a4894ead3f03438b
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- D. Baumann
- M. Zaldarriaga
- D. Green
- Valentin Assassi
- D. Seery
- Dionysios Anninos
- D. Freedman
Citations in the corpus
- Symmetries and loops in inflation (2012, methodology): “Finally, we have included additional factors of log a(t) which, in principle, can arise from the time integration ∫ t dt′ ∼ t ' H−1 log a [6].”
- Late-time structure of the Bunch-Davies de Sitter wavefunction (2014, background): “That the correlations decay in time for massive fields makes physical sense, since the particles dilute due to the expansion of space, and is consistent with a theorem of Weinberg [18].”
- De Sitter space and eternity (2007, background): “Infrared divergences have also been investigated before [5] [7], but we add some new results and approaches.”
- On loops in inflation (2009, methodology): “What happens when this is not the case, for example if the σ fields have a (positive) mass term? This case has been studied and solved by Weinberg in [22].”
- Infrared effects in inflationary correlation functions (2010, methodology): “In calculating loop corrections, Weinberg [54, 55] made use of dimensional regularization.”