Subleading soft photons and large gauge transformations

By Miguel Campiglia, Alok Laddha. 2016

145 citations recorded by the source corpus.

A bstractLysov, Pasterski and Strominger have shown how Low’s subleading soft photon theorem can be understood as Ward identities of new symmetries of massless QED. In this paper we offer a different perspective and show that there exists a class of large U(1) gauge transformations such that (i) the associated (electric and magnetic) charges can be computed from first principles, (ii) their Ward identities are equivalent to Low’s theorem. Our framework paves the way to analyze the sub-subleading theorem in gravity in terms of Ward identities associated to large diffeomorphisms.

Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/227bf2d991ed10f7a7e32a7814ef1dda9464ee98

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In Atomic and Molecular Physics, and Optics

In Nuclear and High Energy Physics

Citations in the corpus

Lectures on the Infrared Structure of Gravity and Gauge Theory (2017, background): “Following the triangle, it is also related to a new symmetry in gauge theory, as discussed in [60,61].”
Superrotation charge and supertranslation hair on black holes (2016, background): “33): a looser boundary condition (see [45, 121, 124, 125]) is certainly of interest but outside our current scope.”
Scattering of spinning black holes from exponentiated soft factors (2018, background): “On a different front, the realization that soft theorems correspond to Ward identities for asymptotic symmetries at null infinity [14] has led to impressive and wide-reaching developments [1, 8, 15–19], see [20] for a recent review.”