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Informal Pizza SeminarHolography, decoding geometry and Poincare recurrencesHolography, decoding geometry and Poincare recurrencesRaul RabadanThe holographic principle is a potentially revolutionary new paradigm in quantum gravity, since it gives up the idea that a fundamental description of physics is local. In place of locality, the principle states that the fundamental degrees of freedom that describe quantum gravity in a region of d+1-dimensional space-time are located on an appropriate d-dimensional subspace, a `screen' located somewhere in that region. A natural question one can ask is how to reconstruct this geometry from boundary data only. In this talk, we will explain this idea of `decoding' the space-time by looking at a special class of boundary observables, namely the two-point correlators of local operators with high conformal dimension. The reconstruction of the bulk space-time from boundary data reduces, in this approximation, to a classical problem in mathematics: the boundary rigidity problem. In the second part of the talk I will explain how some phenomena of finite entropy systems, like Poincare recurrences, can be understood in the dual geometry and the relevance of these phenomena to the information loss paradox in black holes.
Friday, May 21st 2004, 13:00
Ernest Rutherford Physics Building, room 305 |