Quantum Gravity: General Introduction and Recent Developments

Details Quantum Gravity: General Introduction and Recent Developments Quantum Gravity: General Introduction and Recent Developments

2005-08-29

arxiv.org/abs/gr-qc/0508120v2

Annalen Phys. 15 (2005) 129-148

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, 6 figures, invited contribution for "Annalen der Physik", v2: minor corrections, additional references

Scientific paper

10.1002/andp.200510175

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.

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