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Cosmological perturbation theory at three-loop order
Diego Blas, Mathias Garny, Thomas Konstandin
We analyze the dark matter power spectrum at three-loop order in standard perturbation theory of large scale structure. We observe that at late times the loop expansion does not co…
Cosmological constraints on Lorentz violating dark energy
B. Audren, D. Blas, J. Lesgourgues +1
The role of Lorentz invariance as a fundamental symmetry of nature has been lately reconsidered in different approaches to quantum gravity. It is thus natural to study whether othe…
On the non-linear scale of cosmological perturbation theory
Diego Blas, Mathias Garny, Thomas Konstandin
We discuss the convergence of cosmological perturbation theory. We prove that the polynomial enhancement of the non-linear corrections expected from the effects of soft modes is ab…