Phi-fourth theory
= Phi-fourth theory
{title2=$\phi^4$ theory}
{wiki=Quartic_interaction}
Phi-fourth theory has a scalar interaction $-\lambda\phi^4/4!$. In four dimensions its coupling is classically marginal, and its one-loop four-point function receives bubble corrections in the three Mandelstam channels.
= Quartic scalar field theory
{synonym}