dc.contributor.author | Ramirez, Juan | eng |

dc.contributor.author | Kopeikin, Sergei M. | eng |

dc.date.issued | 2002 | eng |

dc.description.abstract | A decoupled system of hyperbolic partial differential equations for linear perturbations around any spatially flat FRW universe is obtained for a wide class of perturbations. The considered perturbing
energy momentum-tensors can be expressed as the sum of the perturbation of a minimally coupled scalar field plus an arbitrary (weak) energy-momentum tensor which is covariantly conserved with respect to the background. The key ingredient in obtaining the decoupling of the equations is the introduction of a new covariant gauge which plays a similar role as harmonic gauge does for perturbations around Minkowski space-time. The case of universes satysfying a linear equation of state is discussed in particular, and closed analytic expressions for the retarded Green's functions
solving the de Sitter, dust and radiation dominated cases are given. | eng |

dc.identifier.citation | arXiv:gr-qc/0110071v2 | eng |

dc.identifier.uri | http://hdl.handle.net/10355/6978 | eng |

dc.language | English | eng |

dc.publisher | arXiv | eng |

dc.relation.ispartofcollection | University of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publications | eng |

dc.source.uri | http://arxiv.org/PS_cache/gr-qc/pdf/0110/0110071v2.pdf | eng |

dc.subject | general relativity | eng |

dc.subject | quantum cosmology | eng |

dc.subject.lcsh | Cosmology -- Mathematics | eng |

dc.title | A decoupled system of hyperbolic equations for linearized cosmological perturbations | eng |

dc.type | Article | eng |