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Participant |
Korzynski, Mikolaj | |||||||
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Institution |
Center for Theoretical Physics, Polish Academy of Science - Al. Lotników 32/46 - Warsaw - - Poland | |||||||
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Session |
DE2 |
Accepted |
Yes |
Order |
1P |
Time |
14:35 | 25' |
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Talk |
Oral abstract |
Title |
Nonlinear effects and coarse-graining in general relativity | |||||
| Coauthors | ||||||||
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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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Pdf file |
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