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Backreaction: directions of progress

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arxiv 1102.0408 v2 pith:AUSC33WE submitted 2011-02-02 astro-ph.CO gr-qc

classification astro-ph.COgr-qc
keywords backreactionprogressbeenbreakdownconcentratingconjecturecosmologicaldirections
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Homogeneous and isotropic cosmological models with ordinary matter and gravity predict slower expansion and shorter distances than observed. It is possible that this failure is due the known breakdown of homogeneity and isotropy related to structure formation, rather than new fundamental physics. We review this backreaction conjecture, concentrating on topics on which there has been progress as well as open issues.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Nonlinear Lattice Framework for Inflation: Bridging stochastic inflation and the $\delta{N}$ formalism

    gr-qc 2026-04 unverdicted novelty 8.0 of 10

    A shear-free locally FLRW lattice framework for single-field inflation captures spatially varying expansion, curvature corrections, and nonlinear δN observables at a fraction of the cost of full numerical relativity.

  2. Einstein-Vlasov Calculations of Structure Formation

    astro-ph.CO 2019-08 accept novelty 6.0 of 10

    Full Einstein-Vlasov simulations show Newtonian N-body collapse is faster than general relativity for extreme density perturbations, but accurate at subpercent level for standard cosmological amplitudes.

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