Speaker
Description
The idea that physical constants and symmetries can be determined by extremizing the entanglement generated in scattering has attracted considerable attention in recent years. In gluon $2\to2$ scattering, however, extremizing bipartite entanglement alone does not uniquely recover gauge invariance, and an additional criterion based on the nonstabilizerness of quantum states is required. Here we revisit this problem in a $2+1$ particle setting, where two gluons scatter in the presence of a noninteracting spectator initially entangled with one of the incoming gluons. We show that requiring the suppression of genuine tripartite entanglement in the forward and backward scattering limits selects the gauge-invariant theory. Thus, extending the analysis to tripartite correlations allows gauge invariance to be recovered from entanglement alone.