An introduction to loop quantum gravity through cosmology

A. Ashtekar

Research output: Contribution to journalArticlepeer-review

130 Scopus citations


This introductory review is addressed to beginning researchers. Some of the distinguishing features of loop quantum gravity are illustrated through loop quantum cosmology of FRW models. In particular, these examples illustrate: i) how "emergent time" can arise; ii) how the technical issue of solving the Hamiltonian constraint and constructing the physical sector of the theory can be handled; iii) how questions central to the Planck scale physics can be answered using such a framework; and, iv) how quantum geometry effects can dramatically change physics near singularities and yet naturally turn themselves off and reproduce classical general relativity when space-time curvature is significantly weaker than the Planck scale.

Original languageEnglish (US)
Pages (from-to)135-155
Number of pages21
JournalNuovo Cimento della Societa Italiana di Fisica B
Issue number2
StatePublished - Feb 2007

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


Dive into the research topics of 'An introduction to loop quantum gravity through cosmology'. Together they form a unique fingerprint.

Cite this