搜索结果: 1-15 共查到“高能物理学 cosmological”相关记录21条 . 查询时间(0.152 秒)
Statistical Properties of Cosmological Billiards
Statistical Properties Cosmological Billiards
2010/12/27
Belinski, Khalatnikov and Lifshitz (BKL) pioneered the study of the statistical properties of the never-ending oscillatory behavior (among successive Kasner epochs) of the geometry near a space-like s...
A Extended Cosmological Cardy-Verlinde Formula
Extended Cosmological Cardy-Verlinde Formula
2010/12/27
E. Verlinde obtained a generalized formula for the entropy of a conformal field theory. For this we consider a (n+1) dimensional closed radiation dominated FLWR in the context of the holographic prin...
De Sitter brane-world, localization of gravity, and the cosmological constant
De Sitter brane-world localization of gravity the cosmological constant
2010/12/24
Cosmological models with a de Sitter 3-brane embedded in a five-dimensional de Sitter spacetime (dS5) give rise to a finite 4D Planck mass similar to that in Randall-Sundrum (RS) brane-world models in...
Evolution of cosmological perturbations in an RG-driven inflationary scenario
cosmological perturbations RG-driven inflationary scenario
2010/12/27
A gauge-invariant, linear cosmological perturbation theory of an almost homogeneous and isotropic universe with dynamically evolving Newton constant G and cosmological constant $\Lambda$ is presented...
In this paper we characterize barotropic index singularities of homogeneous isotropic cosmological models. They are shown to appear in cosmologies for which the scale factor is analytical with a Tayl...
Stability of cosmological solutions in F(R) Horava-Lifshitz gravity
cosmological solutions F(R) Horava-Lifshitz gravity
2010/12/23
At the present paper, it is studied cosmological solutions and its stability in the frame of F(R) Horava-Lifshitz gravity. The perturbations around general spatially flat FRW solutions are analyzed a...
High-order quantum back-reaction and quantum cosmology with a positive cosmological constant
High-order quantum back-reaction quantum cosmology
2010/12/27
When quantum back-reaction by fluctuations, correlations and higher moments of a state becomes strong, semiclassical quantum mechanics resembles a dynamical system with a high-dimensional phase space....
Ultraviolet Divergences in Cosmological Correlations
Ultraviolet Divergences Cosmological Correlations
2010/12/23
A method is developed for dealing with ultraviolet divergences in calculations of cosmological correlations, which does not depend on dimensional regularization. An extended version of the WKB approx...
Cosmological Solutions in Five Dimensional Minimal Supergravity
Cosmological Solutions Supergravity
2010/12/23
We construct new non-stationary cosmological solutions to five-dimensional minimal supergravity that don't have any tri-holomorphic U(1) isometries. Our new solutions, in part, contain some of the pre...
Supersymmetric Cosmological FRW Model and Dark Energy
Supersymmetric Cosmological FRW Model Dark Energy
2010/12/20
In this work we consider a flat cosmological model with a set of fluids in the framework of supersymmetric cosmology. The obtained supersymmetric algebra allowed us to take quantum solutions. It is sh...
Perturbative stability of SFT-based cosmological models
Perturbative stability SFT-based cosmological models
2010/12/21
We review the appearance of multiple scalar fields in linearized SFT based cosmological
models with a single non-local scalar field. Some of these local fields are canonical
real scalar fields and s...
Cosmological Birefringence: an Astrophysical test of Fundamental Physics
Cosmological Birefringence Astrophysical test Fundamental Physics
2010/12/21
We review the methods used to test for the existence of cosmological birefringence, i.e. a rotation of the plane of linear polarization for electromagnetic radiation traveling over cosmological distan...
Cosmological evolution and statefinder diagnostic for new holographic dark energy model in non flat universe
Dark energy；New holographic model；Statefinder diagnostic；Cosmological evolution
2010/12/20
In this paper, the holographic dark energy model with new infrared cut-off proposed by Granda
and Oliveros has been investigated in spatially non flat universe.
Plane-symmetric spacetimes with positive cosmological constant. The case of stiff fluids
Plane-symmetric spacetimes positive cosmological constant stiff fluids
2010/12/20
We consider plane-symmetric spacetimes satisfying Einstein’s field equations with positive cosmological constant, when the matter is a fluid whose pressure is equal to its mass-energy density (i.e. a ...
Towards a non-anthropic solution to the cosmological constant problem
non-anthropic cosmological constant problem
2010/12/22
Many probability measures in the multiverse depend exponentially on some observable parameters, giving rise to potential problems such as youngness bias, Q-catastrophe etc. In this paper we explore a...