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Showing 1 to 10 of 10 for “"braneworld"”.
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Heterotic Braneworld Gravity
… decade, there has been considerable interest in braneworld scenarios where the universe lives on a brane in a higher-dimensional bulk and gravity is modified. The heterotic braneworld scenario of Lukas, Ovrut, Stelle and Waldram (LOSW) is derived from Horava-Witten M-theory, where six of the …
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Recent Progress in Quantum Gravity: Karch-Randall Braneworld, Entanglement Islands and Graviton Mass
… hole information paradox using the so called KR braneworld, which provides the only existing calculable models of entanglement island in higher spacetime dimensions ($D \geq 2 + 1$). Then we point out that the physics of the Karch-Randall braneworld motivates us to formulate a conjecture that, at …
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Topics in stringy cosmology
… We first study the state space of inflationary braneworld models with exponential potential and identify the past and future attractors within the homogeneous state space. Our main result is that the isotropic high energy BDL model is the generic past attractor in the state space of FLRW …
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Die Methode der nichtlokalen effektiven Wirkung in höherdimensionalen Raumzeitmodellen
… study concentrates on a specific type of such "braneworld" models, the <br>Randall-Sundrum two-brane model. In this model the bulk is a slice of five <br>dimensional anti-de Sitter space having an orbifold at the position of both <br>branes. The brane tensions have the same magnitude but …
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Traces of Extra Dimensions in Cosmology
… Kaluza and Klein to the more recent concept of braneworld models and in particular review the cosmological aspects of the DGP braneworld model, which can produce late time acceleration. We then go on to consider the asymmetric brane model, comparing its cosmology to the standard concordance and …
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Stationary Anti-de Sitter Black Hole Solutions in and out of Equilibrium
… the aid of holography. Firstly, we consider a braneworld scenario, which is a string theory-inspired mechanism for extra dimensions in our Universe. We present such rotating braneworld black hole solutions, which closely resemble standard Kerr black holes at large scales, supporting the …
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Kaluza-Klein Theories, Branes and Cosmology
… in the internal spaces of these models to braneworld scenarios, finding interesting connections between the two points of view. We discuss chiral fermion modes which are determined by the structure of the singularities. In order to approach the Cosmological Constant Problem and the related …
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Cosmic expansion in homogeneous and inhomogeneous universes : supernovae type Ia as cosmic probes
… As an example of such a model, we analyze a braneworld model with one timelike extra-dimension. There are strong constraints to the parameter values of such a model resulting from the claim that there must be a physical solution to the Friedmann equation at least between now and the time of …
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Topics in Cosmic Acceleration and Braneworlds
<p>Cosmic acceleration has come to be a standard, and perhaps required, ingredient in our current understanding of the universe. In the early universe, under the name of inflation, a phase of accelerated expansion is used to solve many problems with the standard Hot Big Bang cosmology. In the late …