Observation of negative-frequency waves in a water tank: a classical analogue to the Hawking effect?

Germain Rousseaux, Christian Mathis, Philippe Maissa, Thomas G. Philbin, Ulf Leonhardt

Research output: Contribution to journalArticlepeer-review

191 Citations (Scopus)

Abstract

The conversion of positive-frequency waves into negative-frequency waves at the event horizon is the mechanism at the heart of the Hawking radiation of black holes. In black-hole analogues, horizons are formed for waves propagating in a medium against the current when and where the flow exceeds the wave velocity. We report on the first direct observation of negative-frequency waves converted from positive-frequency waves in a moving medium. The measured degree of mode conversion is significantly higher than that expected from the theory.

Original languageEnglish
Article number053015
Number of pages12
JournalNew Journal of Physics
Volume10
DOIs
Publication statusPublished - 13 May 2008

Keywords

  • BLACK-HOLE EVAPORATION
  • QUANTUM PHYSICS
  • SONIC ANALOG
  • RADIATION

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