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Quantum Gravity (2004)
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| Citations: | 560 - 11 self |
BibTeX
@MISC{Smolin04quantumgravity,
author = {Lee Smolin},
title = {Quantum Gravity},
year = {2004}
}
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Abstract
We describe the basic assumptions and key results of loop quantum gravity, which is a background independent approach to quantum gravity. The emphasis is on the basic physical principles and how one deduces predictions from them, at a level suitable for physicists in other areas such as string theory, cosmology, particle physics, astrophysics and condensed matter physics. No details are given, but references are provided to guide the interested reader to the literature. The present state of knowledge is summarized in a list of 35 key results on topics including the hamiltonian and path integral quantizations, coupling to matter, extensions to supergravity and higher dimensional theories, as well as applications to black holes, cosmology and Plank scale phenomenology. We describe the near term prospects for observational tests of quantum theories of gravity and the expectations that loop quantum gravity may provide predictions for their outcomes. Finally, we provide answers to frequently asked questions and a list of key open problems.
Keyphrases
quantum gravity key result dimensional theory loop quantum gravity particle physic black hole observational test present state condensed matter physic basic physical principle path integral quantization plank scale phenomenology key open problem background independent approach quantum theory basic assumption near term prospect interested reader
