Gauge-invariant Green function in 2+1 dimensional quantum electrodynamics

Gauge invariance of the β-function in nonrelativistic quantum electrodynamics

Recently there has been much interest in gauge theories applied to condensed matter physics. I show that for a system of nonrelativistic electrons coupled to a U(1) gauge field in the presence of a Fermi surface, the β-function to one-loop order is, for a particular family of gauge-choices, independent of the gauge-choice.

Quantum electrodynamics in the temporal gauge.

We canonically quantize electrodynamics in the temporal gauge .4, = 0. Realizing commutation relations in a Hilbert space containing unphysical longitudinal photons, we pay special attention to the implementation of Gauss’s law and the attendant normalization difficulties for physical states. We then formulate the perturbation series and explicitly exhibit equivalence with the standard textbook...

Effective Lagrangian for scale-invariant quantum electrodynamics.

Class of gauge-invariant models of quantum electrodynamics with nonlocal interaction

We present a class of gauge-invariant models of quantum electrodynamics with nonlocal interaction. The models have translation, Lorentz and gauge invariance and reduce to the conventional local quantum electrodynamics under the appropriate limit conditions, both the equations of motion of the charged particle and electromagnetic field obtained by the action principle lead to the normal form of ...

Gauge covariance and the fermion-photon vertex in three- and four-dimensional, massless quantum electrodynamics.

In the quenched approximation, the gauge covariance properties of three vertex Ansätze in the Schwinger-Dyson equation for the fermion self energy are analysed in threeand fourdimensional quantum electrodynamics. Based on the CornwallJackiw-Tomboulis effective action, it is inferred that the spectral representation used for the vertex in the gauge technique cannot support dynamical chiral symme...