Emergent geometries and nonlinear-wave dynamics in photon fluids

Marino, F., Maitland, C., Vocke, D., Ortolan, A. and Faccio, D. (2016) Emergent geometries and nonlinear-wave dynamics in photon fluids. Scientific Reports, 6, 23282. (doi: 10.1038/srep23282) (PMID:27001128) (PMCID:PMC4802342)

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Nonlinear waves in defocusing media are investigated in the framework of the hydrodynamic description of light as a photon fluid. The observations are interpreted in terms of an emergent curved spacetime generated by the waves themselves, which fully determines their dynamics. The spacetime geometry emerges naturally as a result of the nonlinear interaction between the waves and the self-induced background flow. In particular, as observed in real fluids, different points of the wave profile propagate at different velocities leading to the self-steepening of the wave front and to the formation of a shock. This phenomenon can be associated to a curvature singularity of the emergent metric. Our analysis offers an alternative insight into the problem of shock formation and provides a demonstration of an analogue gravity model that goes beyond the kinematic level.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Faccio, Professor Daniele
Authors: Marino, F., Maitland, C., Vocke, D., Ortolan, A., and Faccio, D.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Scientific Reports
Publisher:Nature Publishing Group
ISSN (Online):2045-2322
Published Online:22 March 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Scientific Reports 6:23282
Publisher Policy:Reproduced under a Creative Commons License

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