Unitarization and causalization of nonlocal quantum field theories by classicalization
Unitarization and causalization of nonlocal quantum field theories by classicalization
We suggest that classicalization can cure non-local quantum field theories from acausal divergences in scattering amplitudes, restoring unitarity and causality. In particular, in "trans-non-local" limit, the formation of non-perturbative classical configurations, called {\it classicalons}, in scatterings like $\phi\phi\rightarrow \phi\phi$, can avoid typical acausal divergences.