搜索结果: 1-15 共查到“物理学 Cosmological”相关记录80条 . 查询时间(0.046 秒)
Cosmological multi-black-hole solutions
Einstein Maxwell equation the charged black holes time and space actively the cosmological constant a black hole
2014/12/23
We present simple, analytic solutions to the Einstein-Maxwell equation, which describe an arbitrary number of charged black holes in a spacetime with a positive cosmological constant Λ. In the limit Λ...
Random values of the cosmological constant
The universe physical parameters the cosmological constant
2014/12/22
Abstract One way that an anthropic selection mechanism may be manifest in a physical theory involves multiple domains in the universe with different values of the physical parameters. If this mechanis...
Spatial and temporal gradients in the cosmological constant
Basic physical parameters the universe physical parameters space
2014/12/20
It is possible that there may be differences in the fundamental physical parameters from one side of the observed universe to the other. I show that the cosmological constant is likely to be the most ...
Generalized EMP and Nonlinear Schrodinger-type Reformulations of Some Scaler Field Cosmological Models
Friedmann-Lemaitre-Robertson-Walker Perfect fluid, Schrodinger equation
2014/12/8
We show that Einstein’s gravitational field equations for the Friedmann- Robertson-Lemaître-Walker (FRLW) and for two conformal versions of the Bianchi I and Bianchi V perfect fluid scalar field ...
A Relationship between the Comoving Particle Number and the Effective Cosmological Constant
Comoving Particle Number the Effective Cosmological Constant General Physics
2012/5/28
In order to discuss and obtain the remaining inflaton potential, we introduced an idea called "effective static friction" in our last paper to balance the "force", $\frac{dV}{d\phi}|_{\phi=\phi(t_{res...
A Comparison of Cosmological Codes: Properties of Thermal Gas and Shock Waves in Large Scale Structures
galaxy: clusters, general – methods: numerical – intergalactic medium – largescale structure of Universe
2011/9/13
Cosmological hydrodynamical simulations are a valuable tool for understanding the growth of large scale structure and the observables connected with this. Yet, comparably little attention has been giv...
The Poincare Conjecture and the Cosmological Constant
Manifold Deformations the Poincare Conjecture the Cos-mological Constant
2011/10/8
Abstract: The concept of deformation of Riemannian geometry is reviewed, with applications to gravitation and cosmology. Starting with an analysis of the cosmological constant problem, it is shown tha...
Negative Cosmological Energy Indicated by Supernova Redshift-Luminosity Correlation
Negative Cosmological Energy Supernova Redshift-Luminosity General Relativity and Quantum Cosmology
2011/8/2
Abstract: Milne's classical homogeneous-universe cosmology predicts a product of Hubble constant with luminosity distance that equals z + z2/2, where z is redshift. Supernova-data's support of this un...
A cyclic cosmological model based on the f(ρ) modified theory of gravity
modified gravity, dark energy, cosmology, nonsingular,cosmological constant
2011/8/26
We consider FLRW cosmological models for perfect fluid (with rho as the energy density) in the frame work of the f(rho) modified theory of gravity [V. N. Tunyak, Russ. Phys. J. 21, 1221 (1978); J. R. ...
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...
The cosmological backreaction: gauge (in)dependence, observers and scalars
The cosmological backreaction gauge (in)dependence observers
2010/12/27
We discuss several issues related to a recent proposal for defining classical spatial averages to be used in the so-called cosmological backreaction problem. In the large averaging-volume limit all ga...
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...
Next-to-leading resummations in cosmological perturbation theory
Next-to-leading resummations cosmological perturbation theory
2010/12/27
One of the nicest results in cosmological perturbation theory is the analytical resummaton of the leading corrections at large momentum, which was obtained by Crocce and Scoccimarro for the propagato...