Analysis of information sources in references of the Wikipedia article "Fuzzball (string theory)" in English language version.
However there is a classical phenomenon called superradiance [14-17] in which waves incident in certain modes on a rotating or charged black hole are scattered with increased amplitude [see Section (3)].
In §3, 'Angular Momentum and Charge,' which is 2½ pages starting on p. 213, Hawking began the formula-rich section with the following:
If the collapsing body was rotating or electrically charged, the resulting black hole would settle down to a stationary state which was described, not by the Schwarzchild solution, but by a charged Kerr solution characterised by the mass M, the angular momentum J, and the charge Q.
Superradiance was proposed theoretically by Robert H. Dicke in 1954, and in 1973 was experimentally observed in hydrogen fluoride atoms by N. Skribanowitz et al. However, superradiance is yet to be detected at black holes, per "Black hole 'superradiance' phenomenon may aid quest for dark matter", Paul Sutter, Space.com, (August 16, 2022).
However there is a classical phenomenon called superradiance [14-17] in which waves incident in certain modes on a rotating or charged black hole are scattered with increased amplitude [see Section (3)].
In §3, 'Angular Momentum and Charge,' which is 2½ pages starting on p. 213, Hawking began the formula-rich section with the following:
If the collapsing body was rotating or electrically charged, the resulting black hole would settle down to a stationary state which was described, not by the Schwarzchild solution, but by a charged Kerr solution characterised by the mass M, the angular momentum J, and the charge Q.
Superradiance was proposed theoretically by Robert H. Dicke in 1954, and in 1973 was experimentally observed in hydrogen fluoride atoms by N. Skribanowitz et al. However, superradiance is yet to be detected at black holes, per "Black hole 'superradiance' phenomenon may aid quest for dark matter", Paul Sutter, Space.com, (August 16, 2022).
