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SUMMARY:Anatoly Dymarsky (University of Kentucky)
DTSTART:20250612T130000Z
DTEND:20250612T140000Z
DTSTAMP:20260423T035825Z
UID:QTFMS/4
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QTFMS/4/">Su
 bsystem Entropy in 2d CFT and the Diagonal Approximation</a>\nby Anatoly D
 ymarsky (University of Kentucky) as part of Quantum Theories of Fields\, M
 atter\, and Strings\n\n\nAbstract\nEntanglement entropy is a key quantity 
 in quantum many-body physics\, yet its computation remains challenging out
 side of special cases. In this talk\, I will present a method based on the
  diagonal approximation\, rooted in the subsystem Eigenstate Thermalizatio
 n Hypothesis (ETH)\, for evaluating the entanglement entropy of excited st
 ates and thermal ensembles in the large-subsystem limit. Applying this fra
 mework to two-dimensional conformal field theories (2D CFTs)\, we show tha
 t it reproduces known results for canonical and microcanonical ensembles a
 nd individual primary states\, while also yielding new predictions for KdV
  generalized Gibbs ensembles. Our approach resolves tensions between expli
 cit CFT computations and ETH expectations\, providing indirect support for
  the generalized ETH in 2D CFTs.\n
LOCATION:https://researchseminars.org/talk/QTFMS/4/
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