Classical and quantum gravity in 3 dimensions
timetable:
Fri 9 Sep, 9:00 - 10:00, Aula Dini
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seminar: Observables and the Mapping Class Group in (2+1)-Dimensional Quantum Gravity
speaker: Steven Carlip (University of California at Davis)abstract: One of the most difficult problems in quantum gravity is finding diffeomorphism-invariant observables that can be used to approximately reconstruct a classical geometry. I describe two approaches to this problem, one valid for spacetimes with the spatial topology of a torus and one valid for more general topologies. In both cases, the mapping class group plays a surprisingly important role.
timetable:
Fri 9 Sep, 9:00 - 10:00, Aula Dini
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