Pavan Aluri, Sukanta Panda, Manabendra Sharma, Snigdha Thakur
We analyze the state space of a Bianchi I universe with anisotropic sources. Here we consider an extended state space which includes null geodesics in this background. The evolution equations for all the state observables are derived. Dynamical system approach is used to study the evolution of these equations. The asymptotic stable fixed points for all the evolution equations are found. We also check our analytic results with numerical analysis of these dynamical equations. The evolution of the state observables are studied both in cosmic time and using a dimensionless time variable. Finally the cosmic microwave background anisotropy maps are generated, assuming that the universe is anisotropic and dominated by one of the anisotropic sources since decoupling. We find that they contribute dominantly to CMB quadrupole.
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http://arxiv.org/abs/1210.3159
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