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Quantum gravity: general introduction and recent developments
Author(s) -
Kiefer C.
Publication year - 2006
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.200510175
Subject(s) - quantum gravity , physics , loop quantum gravity , spin foam , general relativity , quantum cosmology , problem of time , theoretical physics , loop quantum cosmology , hořava–lifshitz gravity , string theory , group field theory , quantum geometry , canonical quantum gravity , relationship between string theory and quantum field theory , gravitation , classical mechanics , quantum , open quantum system , quantum mechanics , quantum process , quantum operation , quantum dynamics
I briefly review the current status of quantum gravity. After giving some general motivations for the need of such a theory, I discuss the main approaches in quantizing general relativity: Covariant approaches (perturbation theory, effective theory, and path integrals) and canonical approaches (quantum geometrodynamics, loop quantum gravity). I then address quantum gravitational aspects of string theory. This is followed by a discussion of black holes and quantum cosmology. I end with some remarks on the observational status of quantum gravity.