1 Citation (Scopus)

Abstract

The goal of the article is to provide some glimpses into the challenges and successes of quantum gravity. After a general introduction, for concreteness I focus on a specific approach which goes under the name loop quantum gravity. The underlying ideas are first summarized and recent advances are then illustrated by applying these ideas to cosmology. Quantum effects of geometry resolve the big-bang singularity of classical general relativity. Quantum physics does not break down at the big-bang. In simple models where details have been fully worked out, there is a pre-big-bang branch joined to the current post-big-bang branch by well-defined quantum evolution.

Original languageEnglish (US)
Title of host publicationBeyond the Quantum
PublisherWorld Scientific Publishing Co.
Pages20-34
Number of pages15
ISBN (Electronic)9789812771186
ISBN (Print)9812771174, 9789812771179
DOIs
StatePublished - Jan 1 2007

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gravitation
cosmology
relativity
breakdown
quantum wells
physics
geometry

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ashtekar, A. (2007). What did we learn from quantum gravity? In Beyond the Quantum (pp. 20-34). World Scientific Publishing Co.. https://doi.org/10.1142/9789812771186_0002
Ashtekar, Abhay. / What did we learn from quantum gravity?. Beyond the Quantum. World Scientific Publishing Co., 2007. pp. 20-34
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Ashtekar, A 2007, What did we learn from quantum gravity? in Beyond the Quantum. World Scientific Publishing Co., pp. 20-34. https://doi.org/10.1142/9789812771186_0002

What did we learn from quantum gravity? / Ashtekar, Abhay.

Beyond the Quantum. World Scientific Publishing Co., 2007. p. 20-34.

Research output: Chapter in Book/Report/Conference proceedingChapter

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Ashtekar A. What did we learn from quantum gravity? In Beyond the Quantum. World Scientific Publishing Co. 2007. p. 20-34 https://doi.org/10.1142/9789812771186_0002