Linearization of homogeneous, nearly-isotropic cosmological models

@article{Pontzen2010LinearizationOH,
  title={Linearization of homogeneous, nearly-isotropic cosmological models},
  author={Andrew Pontzen and Anthony Challinor},
  journal={arXiv: General Relativity and Quantum Cosmology},
  year={2010}
}
Homogeneous, nearly-isotropic Bianchi cosmological models are considered. Their time evolution is expressed as a complete set of non-interacting linear modes on top of a Friedmann-Robertson-Walker background model. This connects the extensive literature on Bianchi models with the more commonly-adopted perturbation approach to general relativistic cosmological evolution. Expressions for the relevant metric perturbations in familiar coordinate systems can be extracted straightforwardly. Amongst… 

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