Emergent universe from scale invariant two measures theory |
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Authors: | Sergio del Campo Eduardo I Guendelman Alexander B Kaganovich Ramón Herrera Pedro Labraña |
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Institution: | 1. Instituto de Física, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2950, Casilla 4059, Valparaíso, Chile;2. Physics Department, Ben Gurion University of the Negev, Beer Sheva 84105, Israel;3. Departamento de Física, Universidad del Bío Bío, Avenida Collao 1202, Casilla 5-C, Concepción, Chile |
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Abstract: | The dilaton-gravity sector of a linear in the scalar curvature, scale invariant Two Measures Field Theory (TMT), is explored in detail in the context of closed FRW cosmology and shown to allow stable emerging universe solutions. The model possesses scale invariance which is spontaneously broken due to the intrinsic features of the TMT dynamics. We study the transition from the emerging phase to inflation, and then to a zero cosmological constant phase. We also study the spectrum of density perturbations and the constraints that impose on the parameters of the theory. |
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Keywords: | Emergent universe Inflation |
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