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Asymptotic Symmetries and the Soft Photon Theorem in Arbitrary Dimension

May 13, 2019 - 2:00pm to 4:00pm
Varian Physics - Room 355

Temple He of the University of California, Davis will give the Stanford Institute for Theoretical Physics (SITP) Monday Colloquium.

Abstract: We show that Weinberg's leading soft photon theorem in massless quantum electrodynamics (QED) implies the existence of an infinite-dimensional large gauge symmetry, which acts non-trivially on the null boundaries of (d+2)-dimensional Minkowski spacetime. These symmetries are parameterized by an arbitrary function of the d-dimensional celestial sphere living at null infinity. This extends the equivalence between Weinberg’s leading soft photon theorem and the large gauge symmetries of QED from even dimensions higher or equal to four to all dimensions.

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Stanford Institute for Theoretical Physics
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