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SUMMARY:Chang-Tse Hsieh (Kavli IPMU)
DTSTART:20200529T030000Z
DTEND:20200529T040000Z
DTSTAMP:20260423T021111Z
UID:EASW/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/EASW/2/">Ano
 maly of the electromagnetic duality of Maxwell theory</a>\nby Chang-Tse Hs
 ieh (Kavli IPMU) as part of East Asian String Webinars\n\n\nAbstract\nEver
 y physicist knows that the classical electromagnetism is described by Maxw
 ell's equations and that it is invariant under the electromagnetic duality
  S: (E\, B) → (B\, −E). However\, the properties of the electromagneti
 c duality in the quantum theory might not be as well known to physicists a
 nd are in fact not very well understood in the literature. Recently\, we u
 ncovered a feature of Maxwell theory in the situation where going around n
 ontrivial paths in the spacetime involves the action of the duality transf
 ormation\, namely that it has a quantum anomaly. We found that the anomaly
  of this system in a particular formulation is 56 times that of a Weyl fer
 mion. Our result reproduces\, as a special case\, the known anomaly of the
  all-fermion electrodynamics — a version of the Maxwell theory where par
 ticles of odd (electric or magnetic) charge are fermions — discovered in
  the last few years.\n
LOCATION:https://researchseminars.org/talk/EASW/2/
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