Quantum gravity effects on space-time

Research output: Contribution to conferencePaper

Abstract

General relativity promotes space-time to a physical, dynamical object subject to equations of motion. Quantum gravity, accordingly, must provide a quantum framework for space-time, applicable on the smallest distance scales. Just like generic states in quantum mechanics, quantum space-time structures may be highly counterintuitive. But if low-energy effects can be extracted, they shed considerable light on the implications to be expected for a dynamical quantum space-time. Loop quantum gravity has provided several such effects, but even in the symmetry-reduced setting of loop quantum cosmology no complete picture on effective space-time geometries describing especially the regime near the big bang has been obtained. The overall situation regarding space-time structures and cosmology is reviewed here, with an emphasis on the role of dynamical states, effective equations, and general covariance.

Original languageEnglish (US)
Pages1-16
Number of pages16
Publication statusPublished - Dec 1 2009
Event19th Workshop on General Relativity and Gravitation in Japan, JGRG 2009 - Tokyo, Japan
Duration: Nov 30 2009Dec 4 2009

Other

Other19th Workshop on General Relativity and Gravitation in Japan, JGRG 2009
CountryJapan
CityTokyo
Period11/30/0912/4/09

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Bojowald, M. (2009). Quantum gravity effects on space-time. 1-16. Paper presented at 19th Workshop on General Relativity and Gravitation in Japan, JGRG 2009, Tokyo, Japan.