Gravity, geometry and the quantum

Abhay Ashtekar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

33 Scopus citations


After a brief introduction, basic ideas of the quantum Riemannian geometry underlying loop quantum gravity are summarized. To illustrate physical ramifications of quantum geometry, the framework is then applied to homogeneous isotropic cosmology. Quantum geometry effects are shown to replace the big bang by a big bounce. Thus, quantum physics does not stop at the big-bang singularity. Rather there is a pre-big-bang branch joined to the current post-big-bang branch by a 'quantum bridge'. Furthermore, thanks to the background independence of loop quantum gravity, evolution is deterministic across the bridge.

Original languageEnglish (US)
Title of host publicationAlbert Einstein Century International Conference
Number of pages11
StatePublished - 2006
EventAlbert Einstein Century International Conference - Paris, France
Duration: Jul 18 2005Jul 22 2005

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


OtherAlbert Einstein Century International Conference

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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