TY - JOUR
T1 - Elastic inflation
AU - Gruzinov, Andrei
N1 - Funding Information:
I thank Jose Blanco-Pillado, Gia Dvali, Gregory Gabadadze, and Roman Scoccimarro for useful discussions. This work was supported by the David and Lucile Packard Foundation.
PY - 2004
Y1 - 2004
N2 - Inflation of a universe filled by an elastic continuous medium is considered. Elastic inflation, while capable of describing current observations, is qualitatively different from standard inflationary models. The scalar and tensor modes keep evolving after crossing the horizon. Because of this superhorizon evolution, the amplitude of the tensor mode (inflationary gravitational wave) is not simply proportional to the energy density of the universe at the time of horizon crossing. The spectral index of tensor modes can be positive.
AB - Inflation of a universe filled by an elastic continuous medium is considered. Elastic inflation, while capable of describing current observations, is qualitatively different from standard inflationary models. The scalar and tensor modes keep evolving after crossing the horizon. Because of this superhorizon evolution, the amplitude of the tensor mode (inflationary gravitational wave) is not simply proportional to the energy density of the universe at the time of horizon crossing. The spectral index of tensor modes can be positive.
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U2 - 10.1103/PhysRevD.70.063518
DO - 10.1103/PhysRevD.70.063518
M3 - Article
AN - SCOPUS:84927709341
VL - 70
SP - 5
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 6
ER -