Abstract
We derive the Landau-Khalatnikov-Frandkin transformation (LKFT) for the fermion propagator in quantum electrodynamics (QED) described within a brane-world inspired framework where photons are allowed to move in space-time (bulk) dimensions, while electrons remain confined to a -dimensional brane, with , referred to in the literature as reduced quantum electrodynamics, . Specializing to the case of graphene, namely, with massless fermions, we derive the nonperturbative form of the fermion propagator starting from its bare counterpart and then compare its weak coupling expansion to known one- and two-loop perturbative results. The agreement of the gauge-dependent terms at order and is reminiscent of the structure of LKFT in ordinary QED in arbitrary space-time dimensions and provides strong constraints for the multiplicative renormalizability of .
- Received 13 April 2016
DOI:https://doi.org/10.1103/PhysRevD.93.094035
© 2016 American Physical Society