53 research outputs found
The spectrum of quantum black holes and quasinormal modes
The spectrum of multiple level transitions of the quantum black hole is
considered, and the line widths calculated. Initial evidence is found for these
higher order transitions in the spectrum of quasinormal modes for Schwarzschild
and Kerr black holes, further bolstering the idea that there exists a
correspondence principle between quantum transitions and classical ``ringing
modes''. Several puzzles are noted, including a fine-tuning problem between the
line width and the level degeneracy. A more general explanation is provided for
why setting the Immirzi parameter of loop quantum gravity from the black hole
spectrum necessarily gives the correct value for the black hole entropy.Comment: 5 pages, 5 figures, version to appear in Phys. Rev.
- …