Effective constraints and physical coherent states in quantum cosmology: A numerical comparison

Martin Bojowald, Artur Tsobanjan

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

A cosmological model with a cyclic interpretation is introduced, which is subject to quantum back-reaction and yet can be treated rather completely by physical coherent states as well as effective constraint techniques. By this comparison, the role of quantum back-reaction in quantum cosmology is unambiguously demonstrated. Also the complementary nature of strengths and weaknesses of the two procedures is illustrated. Finally, effective constraint techniques are applied to a more realistic model filled with radiation, a context in which physical coherent states are not available.

Original languageEnglish (US)
Article number145004
JournalClassical and Quantum Gravity
Volume27
Issue number14
DOIs
StatePublished - Jun 9 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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