BMS symmetry in light-cone gravity

Abstract: The aim of this talk is to discuss how the BMS symmetry appears in gravity in the light-cone gauge, a formulation where all unphysical degrees of freedom are integrated out. By checking the invariance of the light-cone Hamiltonian, we obtain a set of residual gauge transformations that satisfy the BMS algebra realized on the two physical fields in the theory. Hence, the BMS algebra appears as a consequence of residual gauge invariance in the bulk without any reference to asymptotic limits. Alternatively, one can also obtain the BMS algebra as a local extension of the Poincaré symmetry in light-cone gravity in four dimensions. In the light-cone formalism, the dynamical part of the Poincaré algebra is enhanced to accommodate the supertranslations, yielding the infinite-dimensional BMS algebra.

general relativity and quantum cosmologyHEP - phenomenologyHEP - theorymathematical physicsquantum physics

Audience: researchers in the topic

HEP seminars TU Wien (Vienna)

Series comments: ID number: 954 8284 9369