Inflationary and deflationary branches in extended pre-big-bang cosmology

1996/05/08 by James E. Lidsey · 2 citations
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Deflation #Economics #Inflation (cosmology) #Keynesian economics #Monetary policy #Physics #Relativity and Gravitational Theory #Theoretical physics #gr-qc

paper · pdf · doi:10.1103/physrevd.55.3303

published as Phys.Rev. D55 (1997) 3303-3312 · 20 pages, latex, 3 figures available on request

arxiv created 1996/05/08 · openalex publication_date 1997/03/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The pre-big-bang cosmological scenario is studied within the context of the Brans-Dicke theory of gravity. An epoch of superinflationary expansion may occur in the pre-big-bang phase of the Universe's history in a certain region of parameter space. Two models are considered that contain a cosmological constant in the gravitational and matter sectors of the theory, respectively. Classical pre- and post-big-bang solutions are found for both models. The existence of a curvature singularity forbids a classical transition between the two branches. On the other hand, a quantum cosmological approach based on the tunneling boundary condition results in a nonzero transition probability. The transition may be interpreted as a spatial reflection of the wave function in minisuperspace.

Citations

• Graceful exit in quantum string cosmology
• A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems
• The development of irregularities in a single bubble inflationary universe
• Mach's Principle and a Relativistic Theory of Gravitation
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• Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking
• Quantum Theory of Gravity. I. The Canonical Theory
• A more accurate analytic calculation of the spectrum of cosmological perturbations produced during inflation
• Can the gravitational wave background from inflation be detected locally?
• Spontaneous creation of almost scale-free density perturbations in an inflationary universe
• Constraints on the scalar-tensor theories of gravitation from primordial nucleosynthesis
• Fluctuations in the New Inflationary Universe
• Chaotic inflation

Cited by

• Expanding and contracting universes in third quantized string cosmology
• Boundary conditions in quantum string cosmology