PIRSA:17060059 Scientific Series Quantum Gravity

DOI10.48660/17060059

Series: Quantum Gravity

Coutant, A. (2017). Black hole superradiance in a bathtub vortex. Perimeter Institute. https://pirsa.org/17060059

Coutant, Antonin. Black hole superradiance in a bathtub vortex. Perimeter Institute, Jun. 15, 2017, https://pirsa.org/17060059 

@misc{ pirsa_PIRSA:17060059,
  doi = {10.48660/17060059},
  url = {https://pirsa.org/17060059},
  author = {Coutant, Antonin},
  keywords = {Quantum Gravity},
  language = {en},
  title = {Black hole superradiance in a bathtub vortex},
  publisher = {Perimeter Institute},
  year = {2017},
  month = {jun},
  note = {PIRSA:17060059 see, \url{https://pirsa.org}}
}

Abstract

I will discuss the possibilities to mimic black hole physics in fluid flows. The starting point is an analogy discovered by Unruh between the propagation of sound in a flowing fluid and waves around a black hole. In these analog setups, it is possible to test various black hole effects, and challenge their robustness. In a recent water wave experiment, we have shown how to exploit this analogy to observe superradiant scattering, that is, the amplification of waves by extraction of angular momentum from a rotating flow.

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