Emergent universe from scale invariant two measures theory

2011/04/12 by Sérgio del Campo, Sergio del Campo, Eduardo I. Guendelman +7 · 5 citations
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Curvature #Dilaton #Friedmann–Lemaître–Robertson–Walker metric #Geometry #Geophysics and Gravity Measurements #Inflation (cosmology) #Invariant (physics) #Mathematical physics #Mathematics #Physics #Quantum mechanics #Scale invariance #Theoretical physics #Universe #astro-ph.CO #gr-qc #hep-th

paper · pdf · doi:10.1016/j.physletb.2011.03.061

10 pages, 2 figures. Accepted for publication in Phys. Lett. B

openalex publication_date 2011/04/12 · arxiv created 2011/05/03 · arxiv updated 2015/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Cosmological Constant - the Weight of the Vacuum
• The singularities of gravitational collapse and cosmology
• Cosmology with a time-variable cosmological 'constant'
• Fine-tuning free paradigm of two-measures theory:k-essence, absence of initial singularity of the curvature, and inflation with graceful exit to the zero cosmological constant state
• The cosmological constant and dark energy
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Strings and branes with a modified measure
• Final Results from theHubble Space TelescopeKey Project to Measure the Hubble Constant
• Emergent universe in a Jordan–Brans–Dicke theory
• A Model‐Independent Determination of the Expansion and Acceleration Rates of the Universe as a Function of Redshift and Constraints on Dark Energy
• The Cosmological Constant
• Dynamics of dark energy
• Cosmological consequences of a rolling homogeneous scalar field
• Kinetically driven quintessence
• The Case for a Positive Cosmological Lambda-term

Cited by

• More on the initial singularity problem in gravity’s rainbow cosmology
• Classically and Quantum stable Emergent Universe from Conservation Laws
• Perturbative instability of cosmology from quantum potential
• A Born–Infeld scalar and a dynamical violation of the scale invariance from the modified measure action
• Curvaton reheating in non-minimal derivative coupling to gravity: NO models

Related

• Initial Singularity, Lambda-Problem and Crossing the Phantom Divide in Scale Invariant TMT Model
• Emergent Cosmology, Inflation and Dark Energy
• Higgs-Inflaton Symbiosis, Cosmological Constant Problem and Superacceleration Phase of the Universe in Two Measures Field Theory with Spontaneously Broken Scale Invariance
• Some Cosmological Applications of Two Measures Theory
• k-Essence, Avoidance of the Weinberg's Cosmological Constant No-Go Theorem and Other Dark Energy Effects of Two Measures Field Theory