Date : February 23, 2021, 15:00 CET

Sean Hartnoll (Stanford)


Title: Planckian transport


 What does everyday copper, high temperature superconductors, magic angle graphene, doped silicon semiconductors, and the quark gluon plasma have in common? All of them, in some regime, are controlled by a `Planckian’ transport timescale made up from fundamental constants and the temperature: tau ~ hbar/(k T). I will review recent and not-so-recent appearances of this timescale across physics, and will discuss whether the ubiquitous appearance of this timescale is a coincidence or potentially indicative of a deep principle in quantum statistical mechanics.