Euclidean Wormholes in Holography and their relation to Wilson Loops by Dr Olga Papadoulaki (Ecole Polytechnique (FR) (Wednesday Apr 24, 2024, 5:00 PM))
April 9, 2024Seminar by Dr Navid Constantinou (University of Melbourne (AU)): “From little things big things grow: how small-scale ocean turbulence affects the global ocean circulation and climate” (May 17, 3:00 PM)
May 8, 2024Thursday Apr 25, 2024, 5:00 PM, Room B228
Abstract: In the context of inflationary cosmology a natural question arises on what precedes inflation itself. We review aspects of the Hartle-Hawking (no boundary) and Vilenkin (tunneling) proposals, and their relation to the Wheeler-DeWitt equation. These raise some paradoxes that are complementary in nature and in clash with observations. On the other hand theories of quantum gravity are better defined in the presence of a negative cosmological constant. I will propose a new type of wavefunction of the universe with asymptotically AdS boundary conditions in the far (Euclidean) past. In the semiclassical limit, it describes a Euclidean (half)-wormhole geometry with properties that result in an expanding universe upon analytic continuation to Lorentzian signature. In this context some of the aforementioned issues can be resolved.
