Inhomogeneous Inflation

  • Katy CloughEmail author
Part of the Springer Theses book series (Springer Theses)


Cosmic Inflation (Guth, Phys Rev D 23:347–356, 1981, [1], Linde, Phys Lett B, 108:389–393, 1982, [2], Albrecht and Steinhardt, Phys Rev Lett 48:1220–1223, 1982, [3], Starobinsky, Phys Lett B 91:99–102, 1980, [4]) is thought to provide a solution to several problems in standard Big Bang theory by dynamically driving a “generic” initial state to a flat, homogeneous and isotropic Universe, while generating a nearly scale-invariant power spectrum of primordial perturbations which is consistent with observations. The question of what constitutes a “generic” initial state is a difficult one, and can only be understood in the context of a quantum theory of gravity. However, regardless of the nature of quantum gravity, a random realisation from the set of all possible initial conditions will not look like an inflationary spacetime, at least initially (Hollands and Wald, Gen Relativ Gravit 34:2043–2055, 2002, [5]), and one should expect the initial conditions from which inflation begins to contain some measure of inhomogeneity.


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© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute for AstrophysicsUniversity of GöttingenGöttingenGermany

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