Quantum Fluctuations in Open Pre-Big Bang Cosmology

Abstract

We solve exactly the (linear order) equations for tensor and scalar perturbations over the homogeneous, isotropic, open pre-big bang model recently discussed by several authors. We find that the parametric amplification of vacuum fluctuations (i.e. particle production) remains negligible throughout the perturbative pre-big bang phase.

12 pages, ReVTeX, Discussion of relation to Ref.[8] modified

References in corpus (9)

• Low energy effective string cosmology
• Metric Perturbations in Dilaton-Driven Inflation
• Canonical Quantization of Cosmological Perturbations in the One Bubble Open Universe
• Inhomogeneous Pre-Big Bang String Cosmology
• Pre-Big-Bang Inflation Requires Fine Tuning
• Classical Inhomogeneities in String Cosmology
• Quantized gravitational waves in the Milne universe
• A numerical simulation of pre-big bang cosmology
• The fine tuning problem in pre-big-bang inflation

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• The Pre-Big Bang Scenario in String Cosmology
• Pre-bangian origin of our entropy and time arrow
• A Causal Entropy Bound
• Pre-big bang bubbles from the gravitational instability of generic string vacua
• Holography, UV/IR Relation, Causal Entropy Bound and Dark Energy
• CFT, Holography, and Causal Entropy Bound
• String cosmology versus standard and inflationary cosmology
• Inflation and initial conditions in the pre-big bang scenario
• Probing signatures of bounce inflation with current observations
• String Cosmology: The Pre-Big Bang Scenario
• Pre-Big Bang Cosmology and Quantum Fluctuations