Tuesday, April 5
11:00 AM -
12:00 PM EDT

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Onset of chaos in disordered CFTs

Micha Berkooz (Weizmann Institute of Science)

Location: Room 5209

Consider the quantum Lyapunov exponent \lambda_L in quantum field theories with spacetime-independent disorder interactions. Generically \lambda_L can only be computed at isolated points in parameter space, and little is known about the way in which chaos grows as we deform the theory away from weak coupling. In this talk we describe families of theories in which the disorder coupling is an exactly marginal deformation, allowing us to follow \lambda_L from weak to strong coupling. We find surprising behaviors in some cases, including a discontinuous transition into chaos. We also derive self-consistency equations for the two- and four-point functions for products of N nontrivial CFTs deformed by disorder at leading order in 1/N.

Host: Vladimir Rosenhaus