Coordinate time dependence in quantum gravity

Martin Bojowald, Parampreet Singh, Aureliano Skirzewski

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

The intuitive classical space-time picture breaks down in quantum gravity, which makes a comparison and the development of semiclassical techniques quite complicated. Using ingredients of the group averaging method to solve constraints one can nevertheless introduce a classical coordinate time into the quantum theory, and use it to investigate the way a semiclassical continuous description emerges from discrete quantum evolution. Applying this technique to test effective classical equations of loop cosmology and their implications for inflation and bounces, we show that the effective semiclassical theory is in good agreement with the quantum description even at short scales.

Original languageEnglish (US)
Article number124022
Pages (from-to)124022-1-124022-14
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume70
Issue number12
DOIs
StatePublished - Dec 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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