EDMUND COPELAND Ed.Copeland@nottingham.ac.uk
Professor of Physics
Asymptotically safe Starobinsky inflation
Copeland, Edmund J.; Rahmede, Christoph; Saltas, Ippocratis D.
Authors
Christoph Rahmede
Ippocratis D. Saltas
Abstract
We revisit Starobinsky inflation in a quantum gravitational context, by means of the exact renormalization group (RG). We calculate the nonperturbative beta functions for Newton’s “constant” G and the dimensionless R^2 coupling, and show that there exists an attractive UV fixed point where the latter one vanishes but not the former one, and we provide the corresponding beta functions. The smallness of the R^2 coupling, required for agreement with inflationary observables, is naturally ensured by its vanishing at the UV fixed point, ensuring the smallness of the primordial fluctuations, as well as providing a theoretical motivation for the initial conditions needed for successful inflation in this context. We discuss the corresponding RG dynamics, showing both how inflationary and classical observations define the renormalization conditions for the couplings, and also how the UV regime is connected with lower energies along the RG flow. Finally, we discuss the consistency of our results when higher-order curvature corrections are included, and show that they are robust to the inclusion of R^3 corrections.
Citation
Copeland, E. J., Rahmede, C., & Saltas, I. D. (2015). Asymptotically safe Starobinsky inflation. Physical Review D, 91(10), https://doi.org/10.1103/PhysRevD.91.103530
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 23, 2015 |
Publication Date | May 22, 2015 |
Deposit Date | Apr 26, 2017 |
Publicly Available Date | Apr 26, 2017 |
Journal | Physical Review D |
Print ISSN | 2470-0010 |
Electronic ISSN | 2470-0029 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 91 |
Issue | 10 |
DOI | https://doi.org/10.1103/PhysRevD.91.103530 |
Public URL | https://nottingham-repository.worktribe.com/output/751485 |
Publisher URL | https://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.103530 |
Contract Date | Apr 26, 2017 |
Files
AS_inflation_v12.pdf
(750 Kb)
PDF
You might also like
No resonant tunneling in standard scalar quantum field theory
(2008)
Journal Article
Cosmological constraints on f(G) dark energy models
(2009)
Journal Article
Evolution and stability of cosmic string loops with Y-junctions
(2009)
Journal Article
General second-order scalar-tensor theory and self-tuning
(2012)
Journal Article
Self-tuning and the derivation of a class of scalar-tensor theories
(2012)
Journal Article
Downloadable Citations
About Repository@Nottingham
Administrator e-mail: discovery-access-systems@nottingham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search