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Quantum geometry and space-time singularities

Ashtekar, A (Pennsylvania State)
Thursday 27 October 2005, 16:00-17.00

Seminar Room 1, Newton Institute


General relativity provides a subtle and powerful interplay between gravity and geometry, thereby opening numerous possibilities for novel phenomena. However, this interplay also implies that the space-time itself ends when the gravitational field becomes singular. In loop quantum gravity, the interplay is elevated to the quantum regime through quantum geometry. I will present examples which suggest that the {\it physical} space-time does not end at singularities. Quantum geometry can serve as a bridge between vast space-time regions which are classically unrelated. Thus, contrary to one's initial intuition, ramifications of quantum geometry can reach far beyond the Planck regime.


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