搜索结果: 1-9 共查到“理学 FRW”相关记录9条 . 查询时间(0.057 秒)
Light propagation and the average expansion rate in near-FRW universes
Light propagation average expansion rate universes
2011/9/29
We consider universes which are close to Friedmann-Robertson-Walker in the sense that metric perturbations, their time derivatives and first spatial derivatives are small, but second spatial derivativ...
Shifted Riccati Procedure: Application to Conformal Barotropic FRW Cosmologies
factorization shifted Riccati procedure barotropic FRW cosmologies
2011/3/2
In the case of barotropic FRW cosmologies, the Hubble parameter in conformal time is the solution of a simple Riccati equation of constant coefficients. We consider these cosmologies in the framework ...
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...
An Interacting Two-Fluid Scienario for Dark Energy in FRW Universe
FRW universe Dark energy
2010/12/20
In this letter we study the evolution of the dark energy parameter within the scope of a spatially flat and isotropic FRW model filled with barotropic fluid and dark energy and the scale factor being ...
Effective Theory in Spinfoam Cosmology: A First Order LQG-corrected FRW Cosmology and the Stiff Fluid
Effective Theory Spinfoam Cosmology First Order LQG-corrected FRW Cosmology Stiff Fluid
2010/12/20
We present an effective theory of a basic holomorphic spinfoam cosmology peaked on homoge-
neous isotropic metrics. The quantum-corrected Hamiltonian constraint of this effective theory is motivated ...
Modified F(R) Horava-Lifshitz gravity: a way to accelerating FRW cosmology
Horava-Lifshitz gravity FRW cosmology
2010/3/19
Masud Chaichian, Shin'ichi Nojiri, Sergei D. Odintsov, Markku Oksanen, Anca Tureanu
(Submitted on 22 Jan 2010 (v1), last revised 14 Mar 2010 (this version, v2))
Abstract: We propose a general approa...
Observables for FRW model with cosmological constant in the framework of loop cosmology
cosmological constant framework of loop cosmology
2010/3/18
We consider a flat cosmological model with a free massless scalar field and the cosmological constant $\Lambda$ in the framework of loop quantum cosmology. The scalar field plays the role of an intrin...
FRW barotropic zero modes: Dynamical systems observability
supersymmetry FRW barotropic cosmology
2010/9/15
The dynamical systems observability properties of barotropic bosonic and fermionic FRW cosmological oscillators are investigated. Nonlinear techniques for dynamical analysis have been recently develop...
Notes on the Quantization of FRW Model in the Presence of a Cosmological Constant and Radiation
FRW Model a Cosmological Constant
2010/10/18
In the present work, we use the formalism of quantum general relativity in order to quantize a Friedmann-Robertson-Walker model in the presence of a negative cosmological constant and radiation. The m...