53 research outputs found

    The spectrum of quantum black holes and quasinormal modes

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    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.

    Die Trennung von Gold und Tellur

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    Separation of gold from tellurium

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    Darstellung kristalliner Selenite und Tellurite

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    Determination of borate ion in ores of borax

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