Alex Maloney

McGill University, September 22, 12:00 pm

Black Holes, Wormholes, and Disordered Systems

Black hole physics provides a powerful window onto some of the deepest and most perplexing questions in quantum field theory and quantum gravity. This can be made precise using the AdS/CFT correspondence, which relates theories of quantum gravity to conformal field theories (CFTs) in one less dimension. These CFTs are similar to the gauge theories which describe the fundamental forces of particle physics, as well as to those which describe important statistical and condensed matter systems at criticality. In studying this correspondence, we have made a surprising discovery: general relativity can be understood as a theory where the coupling constants are essentially random variables, much like in a spin glass or other system with quenched disorder. A key role is played by wormholes, which are solutions of general relativity that connect apparently distant regions of space-time. This has allowed us to answer one of the longest standing problems in theoretical physics – what is quantum gravity? – in certain simple, solvable cases. In answering this question, we have discovered a remarkable relationship between the microscopic physics of black holes and quantum chaos.