The properties of current-carrying steady states of strongly correlated systems away from the linear-response regime are of topical interest. In this article, we review the renormalized perturbation theory (rSPT), or ...

The renormalization in a Lorentz-breaking scalar-spinor higher-derivative model involving phi(4) self-interaction and the Yukawa-like coupling is studied. We explicitly de-monstrate that the convergence is improved in ...