250 citations
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Showing 2020 · gr-qcShow all
3 papers · 2 filters
gr-qc2020★ 5 cited
Universal scattering laws for quiescent bouncing cosmology
Bruno Le Floch, Philippe G. LeFloch, Gabriele Veneziano
Cosmological bounces occur in many gravity theories. We define singularity scattering maps relating large scale geometries before and after the bounce (assuming no BKL oscillations…
gr-qc2020★ 7 cited
A numerical algorithm for Fuchsian equations and fluid flows on cosmological spacetimes
Florian Beyer, Philippe G. LeFloch
We consider a class of Fuchsian equations that, for instance, describes the evolution of compressible fluid flows on a cosmological spacetime. Using the method of lines, we introdu…
gr-qc2020★ 4 cited
Cyclic spacetimes through singularity scattering maps. The laws of quiescent bounces
Bruno Le Floch, Philippe G. LeFloch, Gabriele Veneziano
For spacetimes containing quiescent singularity hypersurfaces we propose a general notion of junction conditions based on a prescribed singularity scattering map, as we call it, an…