English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We studied the scalar electrodynamics ($SQED_{4}$) and the spinorelectrodynamics ($QED_{4}$) in the null-plane formalism. We followed theDirac's technique for constrained systems to perform a detailed analysis of theconstraint structure in both theories. We imposed the appropriated boundaryconditions on the fields to fix the hidden subset first class constraints whichgenerate improper gauge transformations and obtain an unique inverse of thesecond class constraint matrix. Finally, choosing the null-plane gaugecondition, we determined the generalized Dirac brackets of the independentdynamical variables which via the correspondence principle give the(anti)-commutators for posterior quantization.

$SQED_4$ and $QED_4$ on the null-plane