Superradiance or total reflection?

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


Numerical evolution of massless scalar fields on Kerr background is studied. The initial data is chosen to have compact support separated from the ergoregion and to yield nearly monochromatic incident wave packets. The initial data is also tuned to maximize the effect of superradiance.We give evidence indicating that instead of the anticipated energy extraction from the black hole the incident radiation fails to reach the ergoregion and instead it suffers a nearly perfect reflection.

Original languageEnglish
Title of host publicationRelativity and Gravitation - 100 years after Einstein in Prague
EditorsJiří Bičák, Tomáš Ledvinka, Jiří Bičák, Jiří Bičák
PublisherSpringer Science and Business Media, LLC
Number of pages9
ISBN (Electronic)9783319067605
Publication statusPublished - Jan 1 2014
EventInternational conference on Relativity and Gravitation, 2012 - Prague, Czech Republic
Duration: Jun 25 2012Jun 29 2012

Publication series

NameSpringer Proceedings in Physics
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941


OtherInternational conference on Relativity and Gravitation, 2012
CountryCzech Republic


ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

László, A., & Rácz, I. (2014). Superradiance or total reflection? In J. Bičák, T. Ledvinka, J. Bičák, & J. Bičák (Eds.), Relativity and Gravitation - 100 years after Einstein in Prague (pp. 119-127). (Springer Proceedings in Physics; Vol. 157). Springer Science and Business Media, LLC.