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Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Maths HEP Lunchtime Seminars: Anomalies of the entanglement entropy in chiral theories

Presented by Nabil Iqbal, Institute of Physics, University of Amsterdam.

5 February 2016 13:00 in CM221

Certain two-dimensional field theories are afflicted by gravitational anomalies, which imply a non-conservation of stress energy under certain situations. I will discuss universal properties of entanglement entropy in such theories and explain from several points of view how the notion of entanglement entropy now becomes frame-dependent. When such theories have a dual gravitational description, I will explain how the effect of the anomaly is to widen the Ryu-Takayanagi minimal worldline into a “ribbon" whose twist carries non-trivial information. Finally, I will briefly discuss the situation in four dimensions, where the mixed gauge-gravitational anomaly can play a similar role.

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