'Black universe' epoch in string cosmology

Journal Article · Wed Oct 15 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.086002· OSTI ID:21254496

Buchel, Alex ^[1]; Kofman, Lev ^[2]

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1. Department of Applied Mathematics, University of Western Ontario, London, Ontario, N6A 5B7 (Canada)
2. CITA, University of Toronto, 60 St. George Street, Toronto, Ontario, M5S 3H8 (Canada)

String theory compactification involves manifolds with multiple warp factors. For cosmological applications, we often introduce a short, high-energy inflationary throat, and a long, low-energy standard model (SM) throat. It is assumed that at the end of inflation, the excited Kaluza-Klein modes from the inflationary throat tunnel to the SM throat and reheat standard model degrees of freedom, which are attached to probe brane(s). However, the huge hierarchy of energy scales can result in a highly dynamic transition of the throat geometry. We point out that in such a cosmological scenario the standard model throat (together with SM brane) will be cloaked by a Schwarzschild horizon, produced by the Kaluza-Klein modes tunneling from the short throat. The black brane formation is dual to the first order chiral phase transition of the cascading gauge theory. We calculate the critical energy density corresponding the formation of the black hole (BH) horizon in the long throat. We discuss the duality between 'black universe' cosmology and an expanding universe driven by the hot gauge theory radiation. We address the new problem of the hierarchical multiple-throat scenarios: SM brane disappearance after the decay of the BH horizon.

• OSTI ID: 21254496
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BLACK HOLES
CHIRALITY
COMPACTIFICATION
COSMOLOGY
DECAY
DEGREES OF FREEDOM
DUALITY
ENERGY DENSITY
GAUGE INVARIANCE
INFLATION
KALUZA-KLEIN THEORY
PHASE TRANSFORMATIONS
STANDARD MODEL
STRING MODELS
TUNNEL EFFECT
UNIVERSE