How quantum is the big bang?

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


When quantum gravity is used to discuss the big bang singularity, the most important, though rarely addressed, question is what role genuine quantum degrees of freedom play. Here, complete effective equations are derived for isotropic models with an interacting scalar to all orders in the expansions involved. The resulting coupling terms show that quantum fluctuations do not affect the bounce much. Quantum correlations, however, do have an important role and could even eliminate the bounce. How quantum gravity regularizes the big bang depends crucially on properties of the quantum state.

Original languageEnglish (US)
Article number221301
JournalPhysical review letters
Issue number22
StatePublished - Jun 4 2008

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


Dive into the research topics of 'How quantum is the big bang?'. Together they form a unique fingerprint.

Cite this