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Inflation with non-minimal coupling: Metric vs. Palatini formulations
Open accessAbstract
We analyze non-minimally coupled scalar field theories in metric (second-order) and Palatini (first-order) formalisms in a comparative fashion. After contrasting them in a general setup, we specialize to inflation and find that the two formalisms differ in their predictions for various cosmological parameters. The main reason is that dependencies on the non-minimal coupling parameter are different in the two formalisms. For successful inflation, the Palatini approach prefers a much larger value for the non-minimal coupling parameter than the Metric approach. Unlike the Metric formalism, in Palatini, the inflaton stays well below the Planck scale whereby providing a natural inflationary epoch.
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Cites
Inflationary universe: A possible solution to the horizon and flatness problems
Guth, A. H. (1981) · Physical Review D · doi:10.1103/physrevd.23.347 · Cited by 9,983
Linde, A. D. (1982) · Physics Letters B · doi:10.1016/0370-2693(82)91219-9 · Cited by 6,405
Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking
Albrecht, A., & Steinhardt, P. J. (1982) · Physical Review Letters · doi:10.1103/physrevlett.48.1220 · Cited by 4,981
General relativity with spin and torsion: Foundations and prospects
Hehl, F. W., von der Heyde, P., Kerlick, G. D., & Nester, J. M. (1976) · Reviews of Modern Physics · doi:10.1103/revmodphys.48.393 · Cited by 2,709
Particle physics models of inflation and the cosmological density perturbation
Lyth, D. H., & Riotto, A. (1999) · Physics Reports · doi:10.1016/s0370-1573(98)00128-8 · Cited by 2,064
Cited by
The landscape of QCD axion models
Di Luzio, L., Giannotti, M., Nardi, E., & Visinelli, L. (2020) · Physics Reports · doi:10.1016/j.physrep.2020.06.002 · Cited by 657
On the Naturalness of Higgs inflation
Barbón, J. L. F., & Espinosa, J. R. (2009) · Physical Review D · doi:10.1103/physrevd.79.081302 · Cited by 458
Metadata
- Authors
- Bauer, F., & Demir, D. A.
- Venue
- Physics Letters B
- Publisher
- Elsevier BV
- Published
- 2008-07
- Volume
- 665
- Issue
- 4
- Pages
- 222-226
- ISSN
- 0370-2693 (ISSN-L)
- OpenAlex
- W2090082022
- Cited by
- 274
- References
- 5
- FWCI
- 2.75
- Type
- journal article
- Language
- en
- Open access
- bronze
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