Steep inflation: ending braneworld inflation by gravitational particle production
By Edmund J. Copeland, Andrew R. Liddle, J. Lidsey. 2000
141 citations recorded by the source corpus.
We propose a scenario for inflation based upon the braneworld picture, in which high-energy corrections to the Friedmann equation permit inflation to take place with potentials ordinarily too steep to sustain it. Inflation ends when the braneworld corrections begin to lose their dominance. Reheating may naturally be brought about via gravitational particle production, rather than the usual inflaton decay mechanism; the reheat temperature may be low enough to satisfy the gravitino bound and the Universe becomes radiation dominated early enough for nucleosynthesis. We illustrate the idea by considering steep exponential potentials, and show they can give satisfactory density perturbations (both amplitude and slope) and reheat successfully. The scalar field may survive to the present epoch without violating observational bounds, and could be invoked in the quintessential inflation scenario of Peebles and Vilenkin.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/429a141fa5e8184074d0482950e43f64954a48a5
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Citations in the corpus
- Dynamical systems applied to cosmology: Dark energy and modified gravity (2017, methodology): “…& Sopuerta (2001b) assumed perfect fluid matter living on a brane and studied attractor solutions with a bifurcation analysis, while Goheer & Dunsby (2002) repeated the same work for a scalar field on the brane with an exponential potential (for earlier related work see Copeland et al. (2001)).”
- Modified Gravity and Cosmology (2011, unknown): “Cosmological perturbations While the theory describing cosmological perturbations in braneworld gravity has been well developed in recent years (see, for example, [842, 771, 847, 334, 1087, 991, 801, 202, 201, 548, 772, 547, 918, 919, 921, 920, 596, 716, 768, 1244, 742, 1245, 703, 705, 715, 769, 597”
- Brane-World Gravity (2004, background): “This makes slow-roll inflation possible even for potentials that would be too steep in standard cosmology [308, 99, 312, 369, 346, 286, 205].”