Domain wall cosmology and multiple accelerations
نویسندگان
چکیده
منابع مشابه
Extra-dimensional cosmology with domain-wall branes
We show how to define a consistent braneworld cosmology in a model in which the brane is constructed as a field-theoretic domain wall of finite thickness. The Friedmann, Robertson-Walker metric is recovered in the region of the brane, but, remarkably, with scale factor that depends on particle energy and on particle species, constituting a breakdown of the weak equivalence principle on sufficie...
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The correspondence between domain-wall and cosmological solutions of gravity coupled to scalar fields is explained. Any domain wall solution that admits a Killing spinor is shown to correspond to a cosmology that admits a pseudo-Killing spinor: whereas the Killing spinor obeys a Dirac-type equation with hermitian ‘mass’-matrix, the corresponding pseudo-Killing spinor obeys a Dirac-type equation...
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We consider a class of domain-wall black hole solutions in the dilaton gravity with a Liouville-type dilaton potential. Using the surface counterterm approach we calculate the stress-energy tensor of quantum field theory (QFT) corresponding to the domain-wall black hole in the domain-wall/QFT correspondence. A brane universe is investigated in the domain-wall black hole background. When the ten...
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We discuss the brane cosmology in the 5D anti de Sitter Schwarzschild (AdSS 5) spacetime. A brane with the tension σ is defined as the edge of an AdSS 5 space. We point out that the location of the horizon is an apparently , singular point at where we may not define an embedding of the AdSS 5 spacetime into the moving domain wall (MDW). We resolve this problem by introducing a radially infallin...
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A fluid of domain walls may have an effective equation of state pw = − 23ρw. This equation of state is qualitatively in agreement with the supernova type Ia observations. We exploit a cosmological model where the matter content is given by a dust fluid and a domain wall fluid. The process of formation of galaxies is essentially preserved. On the other hand, the behaviour of the density contrast...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2007
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.75.103506