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| Name | Juan Garcia-Bellido: The weight of information: Cosmic acceleration from first principles |
| Video Uploader | Video From InformationUniverse |
| Upload Date | This Video Uploaded At 29-07-2022 10:21:44 |
| Video Discription | The comic web consists of a complex configuration of voids, walls, filaments, and clusters, which formed under the gravitational collapse of Gaussian fluctuations. Understanding under what conditions these different structures emerge from simple initial conditions, and how different cosmological models influence their evolution, is central to the study of the large-scale structure. Here, we present a general formalism for setting up Gaussian random initial conditions satisfying non-linear constraints for specialized $N$-body simulations. These allow us to link the non-linear conditions on the eigenvalue and eigenvector fields of the deformation tensor, as specified by caustic skeleton theory, to the current day cosmic web. By extending constraint Gaussian random field theory, to non-linear constraints, we can probe the statistical properties of the progenitors of the walls, filaments, and clusters of the cosmic web. Tracing the current large scale structure to their seeds in the initial conditions. Applied to cosmological N-body simulations, the proposed techniques pave the way towards a systematic investigation of the evolution of the progenitors of the present-day walls, filaments, and clusters, and the embedded galaxies, putting flesh on the bones of the caustic skeleton. |
| Category | Science & Technology |
| Tags | InformationUniverse | Information Universe |
