München 2009 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 2: Quantengravitation und Quantenkosmologie
GR 2.1: Vortrag
Montag, 9. März 2009, 18:00–18:20, A214
Classical and quantum gravitational collapse in the Lemaitre-Tolman-Bondi model with positive cosmological constant — •Anne Franzen1, Sashideep Gutti2, and Claus Kiefer1 — 1Institut für Theoretische Physik, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany — 2Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
We develop the canonical theory of gravitational collapse for the Lemaitre-Tolman-Bondi model with a positive cosmological constant.
We present the classical canonical formalism and adress the boundary terms in the action. Quantizing the constraints we obtain the Wheeler-deWitt equation. Employing a lattice regularization, we derive exact solutions to all quantum constraints.
We employ these solutions and a general relation between dust time and Killing time to derive the Hawking temperature at the cosmological horizon and at the black hole horizon of the Schwarzschild-de Sitter spacetime. We obtain approximate Planck spectra near the horizons.