Space(-time) structure in models of loop quantum gravity

          @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}}
          }
          

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.