Residual gauge symmetries in the front form

          @misc{ scivideos_PIRSA:22100037,
            doi = {10.48660/22100037},
            url = {https://pirsa.org/22100037},
            author = {Majumdar, Sucheta},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Residual gauge symmetries in the front form},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2022},
            month = {oct},
            note = {PIRSA:22100037 see, \url{https://scivideos.org/pirsa/22100037}}
          }
          

Abstract

The goal of this talk is to discuss residual gauge symmetries in electromagnetism and gravity in Dirac's front form. Working in the light-cone gauge, I will demonstrate how the large gauge transformations and BMS supertranslations may be obtained from residual gauge invariance of the Hamiltonian action. The residual gauge symmetries in this (2+2) formulation share some striking similarities with the asymptotic symmetries in the conventional (3+1) Hamiltonian formulation. I will illustrate this fact using the example of electromagnetism and show how the the zero modes play a crucial role akin to boundary degrees of freedom in the asymptotic analysis at spatial infinity à la Henneaux-Troessaert.