Observation of Noise Correlated by the Hawking Effect in a Water Tank

L.-P. Euvé, F. Michel, R. Parentani, T. G. Philbin, and G. Rousseaux
Phys. Rev. Lett. 117, 121301 – Published 13 September 2016
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Abstract

We measured the power spectrum and two-point correlation function for the randomly fluctuating free surface on the downstream side of a stationary flow with a maximum Froude number Fmax0.85 reached above a localized obstacle. On such a flow the scattering of incident long wavelength modes is analogous to that responsible for black hole radiation (the Hawking effect). Our measurements of the noise show a clear correlation between pairs of modes of opposite energies. We also measure the scattering coefficients by applying the same analysis of correlations to waves produced by a wave maker.

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  • Received 30 November 2015

DOI:https://doi.org/10.1103/PhysRevLett.117.121301

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Fluid DynamicsGravitation, Cosmology & Astrophysics

Authors & Affiliations

L.-P. Euvé1,*, F. Michel2,†, R. Parentani2,‡, T. G. Philbin3,§, and G. Rousseaux1,∥

  • 1Institut Pprime, UPR 3346, CNRS-Université de Poitiers-ISAE ENSMA 11 Boulevard Marie et Pierre Curie-Téléport 2, BP 30179, 86962 Futuroscope Cedex, France
  • 2Laboratoire de Physique Théorique, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
  • 3Physics and Astronomy Department, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom

  • *leo.paul.euve@univ-poitiers.fr
  • florent.michel@th.u-psud.fr
  • Renaud.Parentani@th.u-psud.fr
  • §T.G.Philbin@exeter.ac.uk
  • germain.rousseaux@univ-poitiers.fr

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Issue

Vol. 117, Iss. 12 — 16 September 2016

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