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Related Concept Videos

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Related Experiment Video

Updated: Dec 14, 2025

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
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Dynamics landscape for acoustic superradiance.

Cisco Gooding1

  • 1School of Mathematical Sciences, University of Nottingham, Nottingham, UK.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|July 21, 2020
PubMed
Summary
This summary is machine-generated.

This study analyzes acoustic vortex beams interacting with rotating porous materials to understand rotational superradiance. Findings help characterize this phenomenon in analogue gravity experiments.

Keywords:
acousticsorbital angular momentumrotational superradiance

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Area of Science:

  • Acoustics and Fluid Dynamics
  • Condensed Matter Physics
  • Analogue Gravity

Background:

  • Acoustic vortex beams exhibit complex behaviors when interacting with materials.
  • Rotational superradiance is a phenomenon with potential applications in analogue gravity.
  • Understanding these interactions is crucial for developing new experimental techniques.

Purpose of the Study:

  • To analyze the behavior of acoustic vortex beams interacting with rotating, fluid-saturated porous materials.
  • To identify parameter space regions with distinct dynamical features relevant to rotational superradiance.
  • To compare theoretical predictions of acoustic scattering with experimental proposals.

Main Methods:

  • Analysis of acoustic vortex beam dynamics.
  • Identification of parameter space regions.
  • Comparison of theoretical scattering predictions (microscopic averaging vs. first-Born approximation).

Main Results:

  • Distinct dynamical features were identified in the parameter space.
  • Similarities and differences between experimental proposals for acoustic superradiance were discussed.
  • Theoretical predictions for macroscopic acoustic scattering were compared.

Conclusions:

  • The study provides insights into the characterization of rotational superradiance using acoustic vortex beams.
  • It contributes to the understanding of acoustic-porous material interactions.
  • Findings are relevant for the next generation of analogue gravity experiments.