搜索结果: 1-15 共查到“理学 Cosmological Models”相关记录20条 . 查询时间(0.066 秒)
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 ...
Perturbative stability of SFT-based cosmological models
Perturbative stability SFT-based cosmological models
2010/12/24
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 som...
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...
Oscillations toward the singularity of LRS Bianchi type IX cosmological models with Vlasov matter
Oscillations singularity of LRS Bianchi type IX cosmological models Vlasov matter
2010/12/20
We analyze the dynamics of a class of cosmological solutions of the Einstein-Vlasov equa-
tions. These equations describe an ensemble of collisionless particles (which represent galaxies or clusters ...
Cosmological Models with Fractional Derivatives and Fractional Action Functional
Fractional Derivative and Integral Cosmology
2010/12/20
Cosmological models of a scalar field with dynamical equations containing fractional derivatives or derived from the Einstein-Hilbert action of fractional order, are constructed. A number of exact sol...
Distance and time constraints on accelerating cosmological models
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc) High Energy Physics - Phenomenology (hep-ph)
2010/12/24
The absence of guidance from fundamental physics about the mechanism behind cosmic acceleration has given rise to a number of alternative cosmological scenarios.
The GRBs Hubble diagram in quintessential cosmological models
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
It has been recently empirically established that some of the directly observed pa- rameters of GRBs are correlated with their important intrinsic parameters, like the luminosity or the total radiated...
Equation of state and singularities in FLRW cosmological models
FLRW cosmological models Friedmann equations
2010/3/18
We consider FLRW cosmological models with standard Friedmann equations, but leaving free the equation of state. We assume that the dark energy content of the universe is encoded in an equation of stat...
On the Dynamics of Bianchi IX cosmological models
General Relativity Quantum Cosmology Time Bianchi IX FRW
2010/3/17
A cosmological description of the universe is proposed in the context of Hamiltonian formulation of a Bianchi IX cosmology minimally coupled to a massless scalar field. The classical and quantum resul...
The averaging problem in cosmology is of considerable importance for the correct interpretation of cosmological data. We review cosmological observations and discuss some of the issues regarding avera...
Some Bulk Viscous String Cosmological Models
Higher dimension String cosmology Bulk viscous coefficient
2010/4/8
Five dimensional String cosmological models in the presence of variable bulk viscous coefficient, constant bulk viscous coefficient and in the absence of bulk viscosity are constructed and some physic...
Cosmological Constant and Stability of the Cosmological Models
cosmology cosmological models general relativity
2007/8/15
2002Vol.37No.6pp.667-670DOI:
Cosmological Constant and Stability of the Cosmological Models
WANG Yong-Jiu and TANG Zhi-Ming
Institute of Physics, Hunan Normal University...
Bianchi-Type II String Cosmological Models with Bulk Viscosity
string cosmological
model Bianchi-type II space-time bulk viscosity
2007/8/15
2004Vol.41No.5pp.726-728DOI:
Bianchi-Type II String Cosmological Models with Bulk Viscosity
WANG Xing-Xiang
Department of Physics, Anhui Normal University, Wuhu 241000, ...
Five Dimensional Anisotropic Homogeneous Cosmological Models in Second Self Creation Theory of Gravitation
Five dimensions self creation theory anisotropic spacetime
2010/4/9
Five dimensional homogeneous anisotropic cosmological models in Barber's second self creation theory are constructed when the gravitational field is generated by a perfect fluid. Under the power law d...
Cosmological Models of Universe with Variable Deceleration Parameter in Lyra's Manifold
Cosmology FRW universe Lyra geometry
2010/10/13
FRW models of the universe have been studied in the cosmological theory based on Lyra’s manifold. A new class of exact solutions has been obtained by considering a time dependent displacement field fo...