Semiclassical relations and IR effects in de Sitter and slow-roll space-times

By S. Giddings, M. Sloth. 2010

177 citations recorded by the source corpus.

We calculate IR divergent graviton one-loop corrections to scalar correlators in de Sitter space, and show that the leading IR contribution may be reproduced via simple semiclassical consistency relations. One can likewise use such semiclassical relations to calculate leading IR corrections to correlators in slow-roll inflation. The regulated corrections shift the tensor/scalar ratio and consistency relation of single field inflation, and non-gaussianity parameters averaged over very large distances. For inflation of sufficient duration, for example arising from a chaotic inflationary scenario, these corrections become of order unity. First-order corrections of this size indicate a breakdown of the perturbative expansion, and suggest the need for a non-perturbative description of the corresponding regime. This is analogous to a situation argued to arise in black hole evolution, and to interfere with a sharp perturbative calculation of ``missing information'' in Hawking radiation.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e376725b218dede810489e41b4a423444bf0b71e

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. César Gómez
2. G. Dvali
3. S. Zell
4. E. Kovetz
5. D. Seery
6. M. Kamionkowski
7. Claudia de Rham
8. J. Khoury

In Nuclear and High Energy Physics

1. César Gómez
2. G. Dvali
3. S. Zell
4. E. Kovetz
5. M. Kamionkowski
6. D. Seery
7. Claudia de Rham
8. J. Khoury

Citations in the corpus

• Infrared effects in inflationary correlation functions (2010, result): “As this paper was being completed, a recalculation of the graviton loop appeared in [145], which agrees with the result given [146].”
• Quantum break-time of de Sitter (2017, background): “We note that this time-scale appeared previously in several different contexts [8, 9], but we shall focus on the physical meaning it acquires in our framework.”
• The Quest for B Modes from Inflationary Gravitational Waves (2015, background): “…background may give rise to local quadrupolar departures from statistical isotropy in primordial perturbations (Maldacena 2003; Seery, Sloth & Vernizzi 2009; Giddings & Sloth 2011, 2012; Jeong & Kamionkowski 2012; Jeong & Schmidt 2012; Schmidt & Jeong 2012a; Bramante et al. 2013).”