Quantum geometrodynamics of Einstein and conformal (Weyl-squared) gravity

8th International Workshop DICE2016: Spacetime - Matter - Quantum Mechanics

物理学;力学

Kiefer, Claus^1 ; Nikoli, Branislav^1

Institut für Theoretische Physik, Universität zu Köln, Zülpicher Straße 77, Köln

50937, Germany^1

关键词: Canonical quantization;    General Relativity;    Quantum constraints;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/880/1/012002/pdf
DOI  :  10.1088/1742-6596/880/1/012002

学科分类：力学，机械学

来源: IOP

【 摘 要 】

We discuss the canonical quantization of general relativity and Weyl-squared gravity. We present the classical and quantum constraints and discuss their similarities and differences. We perform a semiclassical expansion and discuss the emergence of time for the two theories. While in the first case semiclassical time has a scale and a shape part, in the second case it only has a shape part.