Loop Quantum Gravity and Cosmology: A dynamical introduction

Abstract

Loop quantum gravity and cosmology are reviewed with an emphasis on evaluating the dynamics, rather than constructing it. The three crucial parts of such an analysis are (i) deriving effective equations, (ii) controlling the theory's microscopic degrees of freedom that lead to its spatial discreteness and refinement, and (iii) ensuring consistency and anomaly-freedom. All three issues are crucial for making the theory testable by conceptual and observational means, and they remain challenging. Throughout this review, the Hamiltonian nature of the theory will play a large role for properties of space-time structure within the framework discussed.

45 pages, 1 figure, based on a talk presented at the workshop "Foundations of Space and Time - Reflections on Quantum Gravity", STIAS, Stellenbosch, South Africa, 10-14 August 2009, to appear in CUP

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Cited by in corpus (7)

• From the discrete to the continuous - towards a cylindrically consistent dynamics
• Implications of the gauge-fixing in Loop Quantum Cosmology
• A critical analysis of the cosmological implementation of Loop Quantum Gravity
• Effective quantum tunneling from semiclassical momentous approach
• Local Hamiltonian for Spherically Symmetric Collapse: Geometrodynamics Approach
• Effective quantum equations for the semiclassical description of the Hydrogen atom
• The Early Universe and Planck's Radiation Law