# Gerard 't Hooft video lecture-Perimeter

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Gerard 't Hooft video lecture--Perimeter

http://pirsa.org/08040000/

online video of lecture 't Hooft gave on 7 May, 2008

Black Holes and the Foundations of Quantum Mechanics
Gerard 't Hooft - Spinoza Institute for Theoretical Physics
"The theory of Quantum Mechanics requires 'completeness', that is, we need to know the complete set of physically allowed states before we can reliably compute quantum mechanical amplitudes. Among these possible states are microscopic black holes, since they are valid solutions to Einstein's equations for the gravitational force. However, a quantum description of black holes requires a drastic revision of our notions of space and time, in particular if we were to accept the interpretation of their microstates as given by superstring theories..."

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