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566
Holography in Radiationdominated Universe with a
, 2002
"... We discuss the holographic principle in a radiationdominated, closed FriedmannRobertsonWalker (FRW) universe with a positive cosmological constant. By introducing a cosmological Dbound on entropy of matter in the universe, we can write the Friedmann equation governing evolution of the universe i ..."
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We discuss the holographic principle in a radiationdominated, closed FriedmannRobertsonWalker (FRW) universe with a positive cosmological constant. By introducing a cosmological Dbound on entropy of matter in the universe, we can write the Friedmann equation governing evolution of the universe
a Radiation Dominated Universe
, 2000
"... The holographic principle is studied in the context of a n + 1 dimensional radiation dominated closed FriedmanRobertsonWalker (FRW) universe. The radiation is represented by a conformal field theory with a large central charge. Following recent ideas on holography, it is argued that the entropy de ..."
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The holographic principle is studied in the context of a n + 1 dimensional radiation dominated closed FriedmanRobertsonWalker (FRW) universe. The radiation is represented by a conformal field theory with a large central charge. Following recent ideas on holography, it is argued that the entropy
Scaling Property of the global string in the radiation dominated universe
, 1999
"... PACS number: 98.80.Cq We investigate the evolution of the global string network in the radiation dominated universe by use of numerical simulations in 3+1 dimensions. We find that the global string network settles down to the scaling regime where the energy density of global strings, ρs, is given by ..."
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PACS number: 98.80.Cq We investigate the evolution of the global string network in the radiation dominated universe by use of numerical simulations in 3+1 dimensions. We find that the global string network settles down to the scaling regime where the energy density of global strings, ρs, is given
Matching RadiationDominated and MatterDominated Einsteinde Sitter Universes and an Application for Primordial Black Holes in Evolving Cosmological Backgrounds
, 2006
"... Abstract By matching across a surface of constant time, it is demonstrated that the spacetime for a radiationdominated Einsteinde Sitter universe can be directly matched to the spacetime for a matterdominated Einsteinde Sitter universe. Thus, this can serve as a model of a universe filled with ..."
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Abstract By matching across a surface of constant time, it is demonstrated that the spacetime for a radiationdominated Einsteinde Sitter universe can be directly matched to the spacetime for a matterdominated Einsteinde Sitter universe. Thus, this can serve as a model of a universe filled
RadiationDominated Quantum Friedmann Models
 Journal of Mathematical Physics
, 1996
"... Radiationfilled FriedmannRobertsonWalker universes are quantized according to the ArnowittDeserMisner formalism in the conformaltime gauge. Unlike previous treatments of this problem, here both closed and open models are studied, only squareintegrable wave functions are allowed, and the bound ..."
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Radiationfilled FriedmannRobertsonWalker universes are quantized according to the ArnowittDeserMisner formalism in the conformaltime gauge. Unlike previous treatments of this problem, here both closed and open models are studied, only squareintegrable wave functions are allowed
Force Behaviour in RadiationDominated Friedmann Universe
, 2004
"... We consider radiationdominated Friedmann universe and evaluate its force fourvector and momentum. We analyse and compare the results with the already evaluated for the matterdominated Friedmann model. It turns out that the results are physically acceptable. 1 ..."
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We consider radiationdominated Friedmann universe and evaluate its force fourvector and momentum. We analyse and compare the results with the already evaluated for the matterdominated Friedmann model. It turns out that the results are physically acceptable. 1
IFT15/92 GRAVITATIONALLY INDUCED SCALAR FIELD FLUCTUATIONS IN THE RADIATION DOMINATED RW UNIVERSE ∗
, 1992
"... It is shown that quantum fluctuations due to a nontrivial gravitational background in the flat radiation dominated universe can play an important cosmological role generating nonvanishing cosmological global charge, e.g. baryon number, asymmetry. The explicit form of the fluctuations at vacuum and a ..."
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It is shown that quantum fluctuations due to a nontrivial gravitational background in the flat radiation dominated universe can play an important cosmological role generating nonvanishing cosmological global charge, e.g. baryon number, asymmetry. The explicit form of the fluctuations at vacuum
Acoustics of early universe. — Flat versus open universe models
, 2008
"... A simple perturbation description unique for all signs of curvature, and based on the gaugeinvariant formalisms is proposed to demonstrate that: (1) The density perturbations propagate in the flat radiationdominated universe in exactly the same way as electromagnetic or gravitational waves propaga ..."
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A simple perturbation description unique for all signs of curvature, and based on the gaugeinvariant formalisms is proposed to demonstrate that: (1) The density perturbations propagate in the flat radiationdominated universe in exactly the same way as electromagnetic or gravitational waves
grqc/9410039 UCSBTHnnnn Dynamical Systems Treatment of Scalar Field Cosmologies
, 1994
"... The conformal equivalence of some cosmological models in BransDicke theory to general relativistic cosmologies with a scalar field is discussed. In the case of radiationdominated universes, it is shown that the presence of the scalar field has a negligible impact upon the evolution of the models i ..."
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The conformal equivalence of some cosmological models in BransDicke theory to general relativistic cosmologies with a scalar field is discussed. In the case of radiationdominated universes, it is shown that the presence of the scalar field has a negligible impact upon the evolution of the models
Results 1  10
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566