We discuss some approaches to the problem of modelling cosmic anisotropy. We review the concept of emergence in cosmology, focusing in particular on Buchert’s averaging-based procedure, and show how it may be useful for describing anisotropy. Finally, we introduce an emergence-based mechanism that may be able to generate anisotropy from non-linear structures in the late Universe, without requiring substantial anisotropy to be present at early times.

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Is Cosmic Anisotropy an Emergent Phenomenon?

  • Theodore Anton

摘要

We discuss some approaches to the problem of modelling cosmic anisotropy. We review the concept of emergence in cosmology, focusing in particular on Buchert’s averaging-based procedure, and show how it may be useful for describing anisotropy. Finally, we introduce an emergence-based mechanism that may be able to generate anisotropy from non-linear structures in the late Universe, without requiring substantial anisotropy to be present at early times.