نتایج جستجو برای: higher dimensional cosmology
تعداد نتایج: 1369042 فیلتر نتایج به سال:
Considering the cosmology with mythological form of consciousness era as the primary base of metaphysical form and the basis of development toward an integrated cosmology, political ideas has been placed in an organic link with a metaphysical system in the ancient Persians as well as Chinese political thought. Based on considerable similarities among cosmological systems in civilizations e.g....
The current acceleration of the universe leads us to investigate higher dimensional gravity theory, which is able to explain acceleration from a theoretical view point without the need of introducing dark energy by hand. We argue that the terms containing higher dimensional metric coefficients produce an extra negative pressure that apparently drives an acceleration of the 3D space, tempting us...
We evaluate the physical viability and logical strength of an array putative criteria for big bang singularity resolution in quantum cosmology. Based on this analysis, we propose a mutually consistent set constitutive conditions, which argue should be taken to jointly define `global' `local' context. Whilst present article will focus exclusively evaluating singularities context finite dimension...
We study the quantum cosmology of an empty (4+1)-dimensional Kaluza-Klein cosmology with a negative cosmological constant and a RW type metric with two scale factors, one for 4-D universe and the other for one compact extra dimension. By assuming the noncommutativity in the corresponding mini-superspace and Wheeler-DeWitt equation we suggest a solution for the cosmological constant problem. PAC...
We measure the ellipticity of isolated clusters of galaxies in the Sloan Digital Sky Survey (SDSS) using gravitational lensing. We stack the clusters, rotating so that the major axes of the ellipses determined by the positions of cluster member galaxies are aligned. We exclude the signal from the central 0.5 h Mpc to avoid problems with stacking alignment and cluster member contamination. We fi...
The Standard Big Bang (SBB) cosmology has become an extremely successful model that has been well tested by experiment. However, the model is incomplete. The underlying theory of classical general relativity and the description of matter as an ideal gas breaks down at the high temperatures of the early Universe, and the solutions of the theory in fact have an initial singularity. Moreover, SBB ...
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