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Scattering of co-current surface waves on an analogue black hole
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We report on what is to our knowledge the first scattering experiment of surface waves on an accelerating transcritical flow, which in the Analogue Gravity context is described by an effective spacetime with a black-hole horizon. This spacetime has been probed by an incident co-current wave, which partially scatters into an outgoing counter-current wave on each side of the horizon. The measured scattering amplitudes are compatible with the predictions of the hydrodynamical theory, where the kinematical description in terms of the effective metric is exact.
Forward citations
Cited by 3 Pith papers
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Robustness of analogue Hawking radiation in cavities with moving boundaries
Thermal Hawking-like radiation in moving-mirror cavities is robust only for selected expanding configurations and low frequencies; all other configurations tested show non-thermal spectra.
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Departing from thermality of analogue Hawking radiation in a Bose-Einstein condensate
In a step-like BEC acoustic black hole, the Hawking-partner correlation spectrum computed with a complete Bogoliubov basis departs significantly from thermal at finite wavelengths.
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Analogue gravity with Bose-Einstein condensates
Phonons in a Bose–Einstein condensate behave as a massless scalar field on an acoustic spacetime; these notes derive that mapping in detail and apply it to superradiance and analogue Hawking radiation.
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