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SUMMARY:“Sensitivity of BPS microstates” by Sean Colin-Ellerin\, CERN
DTSTART;VALUE=DATE:20260316
DTSTAMP:20260416T081210Z
UID:65eb737b3e7f9961b061f01e7442e83721dac60dcad854c15c756318
CATEGORIES:Conferences - Seminars
DESCRIPTION:A key signature of chaos in quantum systems is the random matr
 ix behavior in the repulsion of energy levels. Since black holes are expec
 ted to be highly chaotic\, their energy levels should exhibit such behavio
 r. However\, this cannot be true for BPS black holes as the energies of al
 l of their microstates are fixed to be equal by the BPS bound. I will pres
 ent a new diagnostic of chaos for BPS black holes\, namely the sensitivity
  of their microstates to the couplings of the theory. This sensitivity can
  be detected by the mixing matrix for this degenerate subspace as one move
 s on moduli space\, known as the Berry curvature. I will show that for for
 tuitous states in the N=2 supersymmetric SYK model and N=2 JT gravity\, wh
 ich are toy models for the black hole microstates\, the Berry curvature ha
 s random matrix statistics. On the other hand\, for the monotonous states
  dual to smooth\, horizonless supergravity solutions\, I will show in many
  different examples that the curvature is not chaotic at all.
LOCATION:BSP 727 https://plan.epfl.ch/?room==BSP%20727 https://epfl.zoom.u
 s/j/69362612859
STATUS:CONFIRMED
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