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PIRSA:14040144

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https://pirsa.org/14040144

Probing renormalization group flows using entanglement entropy

Mezei, M. (2014). Probing renormalization group flows using entanglement entropy. Perimeter Institute for Theoretical Physics. https://pirsa.org/14040144

Mark Mezei Massachusetts Institute of Technology (MIT)

Talk numberPIRSA:14040144
DOI10.48660/14040144
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

The entanglement entropy of the vacuum of a quantum field theory contains information about physics at all scales and is UV sensitive. A simple refinement of entanglement entropy gets rid of its UV divergence, and allows us to extract entanglement per scale. In two and three spacetime dimensions this quantity can be used as a proxy for the number of degrees of freedom, as it decreases under RG flow. We investigate its behavior around fixed points, and reveal its interesting analytic structure in the space of couplings.