4.8 Article

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

期刊

PHYSICAL REVIEW LETTERS
卷 117, 期 12, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.121301

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资金

  1. University of Poitiers (ACI UP on Wave-Current Interactions)
  2. Interdisciplinary Mission of CNRS (PEPS PTI DEMRATNOS)
  3. University of Tours (ARC Poitiers-Tours)
  4. French national research agency (ANR) HARALAB [ANR-15-CE30-0017-04]
  5. FEDER [35790-2012]
  6. FQXi grant of the Silicon Valley Community Foundation

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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 F-max approximate to 0.85 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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