Berlin 2014 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 7: Quantum Gravity and Quantum Cosmology I
GR 7.1: Vortrag
Montag, 17. März 2014, 17:30–17:50, SPA SR220
Resolution of type IV singularities in quantum cosmology — Mariam Bouhmadi-López1, Claus Kiefer2, and •Manuel Krämer2 — 1Department of Theoretical Physics, University of the Basque Country UPV/EHU, P.O. Box 644, 48080 Bilbao, Spain — 2Institut für Theoretische Physik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
We discuss the fate of classical type IV singularities in quantum cosmology. As a framework we use Wheeler-DeWitt quantization applied to a homogeneous and isotropic universe with a perfect fluid described by a generalized Chaplygin gas. Such a fluid can be dynamically realized by a scalar field. We treat the cases of a standard scalar field with positive kinetic energy and of a scalar field with negative energy (phantom field). We are able to solve the Wheeler-DeWitt equation for these models analytically for a special case and to draw conclusions for the general case. Adopting the criterion that singularities are avoided if the wave function vanishes in the region of the classical singularity, we find that type IV singularities are avoided only for particular solutions of the Wheeler-DeWitt equation. We compare this result with earlier results found for other types of singularities.