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Speaker |
Korzynski, Mikolaj |
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| Talk Title |
Nonlinear effects and coarse-graining in general relativity |
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Abstract |
When do the relativistic, non-linear corrections to the large-scale effective stress energy tensor matter in general relativity? I present two exact examples in which the corrections turn out to be important: the first one, in which the matter is distributed in the form of a collection of very compact objects, and second one, where continuous a distribution of dust contains perturbations in the form of nested voids and overdense regions extending over many scales. I will discuss the magnitude of non-linear corrections to the coarse-grained energy density and show that they are large when the matter tends to cluster on the small scales. |
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