Space(-time) structure in models of loop quantum gravity
APA
Bojowald, M. (2017). Space(-time) structure in models of loop quantum gravity. Perimeter Institute. https://pirsa.org/17060102
MLA
Bojowald, Martin. Space(-time) structure in models of loop quantum gravity. Perimeter Institute, Jun. 27, 2017, https://pirsa.org/17060102
BibTex
@misc{ pirsa_PIRSA:17060102, doi = {10.48660/17060102}, url = {https://pirsa.org/17060102}, author = {Bojowald, Martin}, keywords = {Cosmology}, language = {en}, title = {Space(-time) structure in models of loop quantum gravity}, publisher = {Perimeter Institute}, year = {2017}, month = {jun}, note = {PIRSA:17060102 see, \url{https://pirsa.org}} }
Pennsylvania State University
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Abstract
Loop quantum gravity has suggested modifications of the dynamics of cosmological models that could lead to a bounce at large curvature. However, the same modifications may alter the gauge structure of the theory, which is related to the structure of space-time. In a large class of examples the space-time structure has been derived and shown to imply signature change just in the bounce region. The picture of a cyclic universe with a deterministic bounce then has to be replaced by the scenario of a non-singular beginning some finite time ago.