From big bang to asymptotic de Sitter: Complete cosmologies in a quantum gravity framework - INSPIRE

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From big bang to asymptotic de Sitter: Complete cosmologies in a quantum gravity framework

M. Reuter
(
- Mainz U., Inst. Phys.
)
,
Frank Saueressig
(
- Jena U., TPI and
- Utrecht U.
)

Jul, 2005

47 pages

Published in:

JCAP 09 (2005) 012

e-Print:

hep-th/0507167 [hep-th]

DOI:

10.1088/1475-7516/2005/09/012

Report number:

MZ-TH-05-14,
ITP-UU-05-27,
SPIN-05-21

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Abstract:

Using the Einstein-Hilbert approximation of asymptotically safe quantum gravity we present a consistent renormalization group based framework for the inclusion of quantum gravitational effects into the cosmological field equations. Relating the renormalization group scale to cosmological time via a dynamical cutoff identification this framework applies to all stages of the cosmological evolution. The very early universe is found to contain a period of ``oscillatory inflation'' with an infinite sequence of time intervals during which the expansion alternates between acceleration and deceleration. For asymptotically late times we identify a mechanism which prevents the universe from leaving the domain of validity of the Einstein-Hilbert approximation and obtain a classical de Sitter era.

Note:

47 pages, 17 figures

quantum gravity
cosmological model
renormalization group
asymptotic behavior
space-time: de Sitter
numerical calculations

References(87)

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