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High Energy Theory Seminar

Friday, April 3, 2020
11:00am to 12:00pm
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Online Event
Reparametrization Modes in CFTs & Applications
Felix Haehl, Institute for Advanced Study,

https://caltech.zoom.us/j/795527605

Reparametrization modes provide one way of describing universal physics of energy-momentum exchanges in CFTs. Drawing inspiration from the effective field theory of quantum chaos and the SYK model, I will argue that this perspective offers a useful computational and conceptual framework. For example, stress tensor contributions to conformal blocks can be systematically organized in terms of reparametrization mode exchanges, thus leading to a simple and efficient diagrammatic perturbation theory at large central charge. To illustrate this method, I will discuss some known stress tensor conformal blocks in various dimensions, and will also present a new result regarding the six-point "identity block" in 2d CFTs. I will also mention applications to thermal physics in higher dimensions and argue that the theory of reparametrization modes provides useful intuition for the physics underlying quantum chaos in Rindler space

For more information, please visit http://theory.caltech.edu/people/seminar/.