Hydrodynamical black holes in theory and in practice

Abstract : 

Water waves on inhomogeneous flows provide a particularly intuitive example of an Analogue Gravity system [1,2].  This classical non-relativistic framework reproduces several aspects of gravitation and black holes that seem very exotic, such as the existence of negative-energy waves in the black-hole interior and the occurrence of an analogue Hawking effect.

In this talk, I will provide a brief overview of the water wave analogy with gravity, emphasizing the simplicity of the derivation of the governing equations, and pointing out the correspondence between concepts in GR and hydrodynamics.  I will present some of our experimental observations on the realisation of transcritical flows [3-5], with emphasis on the search for the Hawking effect and the difficulties to be overcome.

[1] R. Schützhold and W. G. Unruh, “Gravity wave analogues of black holes”, Phys. Rev. D 66, 044019 (2002)
[2] G. Rousseaux, “The basics of water waves theory for Analogue Gravity” (from Analogue Gravity Phenomenology, Lecture Notes in Physics volume 870, Springer, 2013)
[3] L.-P. Euvé et al., “Scattering of co-current surface waves on an analogue black hole”, Phys. Rev. Lett. 124, 141101 (2020)
[4] J. Fourdrinoy et al., “Correlations on weakly time-dependent transcritical white-hole flows”, Phys. Rev. D 105, 085022 (2022)
[5] A. Bossard et al., “On the art of designing effective space-times with free surface flows in Analogue Gravity”, Comptes Rendus. Physique, volume 25 (2024), pp. 457-511

‼️ Le séminaire peut être suivi en ligne via le lien : https://univ-amu-fr.zoom.us/j/81984994806?pwd=4V0kim9Bw6NTbEw92mAwDg5cl0wLBf.1

Le mardi 8 septembre 2026 à 11h00 / Amphithéâtre François Canac, LMA

Voir en ligne : plus d’informations concernant l’orateur