Tuesday, Sept 26th: Quantum chaos and black holes

Event Date: 

Tuesday, September 26, 2017 - 4:00pm

Event Date Details: 

Refreshments served at 3:40 pm.

Event Location: 

  • Broida 1640
  • Physics Colloquium
 
 
Sensitive dependence on initial conditions, or the ``butterfly effect,'' is a vivid diagnostic of chaos in both classical and quantum physics. Black holes display this phenomenon in a simple way that nevertheless saturates a general bound on the strength of chaos. We show how this works, and review how the same behavior arises in a quantum mechanics model known as the Sachdev-Ye-Kitaev model.
 
Other aspects of quantum chaos, such as a structured random set of energy levels, are not obvious in black holes, and understanding their origin is a crucial problem in quantum gravity. We discuss how the SYK model might give us clues about how to proceed.