Loop quantum cosmology and boundary proposals

Martin Bojowald, Kevin Vandersloot

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations


For many years, the most active area of quantum cosmology has been the issue of choosing boundary conditions for the wave function of a universe. Recently, loop quantum cosmology, which is obtained from loop quantum gravity, has shed new light on this question. In this case, boundary conditions are not chosen by hand with some particular physical intuition in mind, but they are part of the dynamical law. It is then natural to ask if there are any relations between these boundary conditions and the ones provided before. After discussing the technical foundation of loop quantum cosmology which leads to crucial differences to the Wheeler–DeWitt quantization, we compare the dynamical initial conditions of loop quantum cosmology with the tunneling and the no-boundary proposal and explain why they are closer to the no-boundary condition. We end with a discussion of recent developments and several open problems of loop quantum cosmology.

Original languageEnglish (US)
Title of host publicationThe Tenth Marcel Grossmann Meeting
Subtitle of host publicationOn Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories
PublisherWorld Scientific Publishing Co.
Number of pages15
ISBN (Electronic)9789812704030
ISBN (Print)9789812566676
StatePublished - Jan 1 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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