2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92251Large optical nonlinearities occurring in a coherently prepared atomic system are shown to produce phase shifts of order $π$. Such an effect may be observed in ultracold rubidium atoms where it could be feasibly exploited toward the realization of a polarization phase gate.Foundations of Quantum Information, Camerino, 16th-19th April 2004, ItalyQuantum PhysicsA Proposal for an Optical Implementation of an Universal Quantum Phase Gatetext