Scientists from IFIMAC-UAM and IFF-CSIC, Alejandro Vivas-Viaña, Diego Martín-Cano, and Carlos Sánchez Muñoz, have advanced our understanding of quantum light-matter interactions, uncovering mechanisms for generating near-maximal entanglement between two nonidentical interacting quantum emitters coherently driven at the two-photon resonance and embedded in a cavity. This scenario yields two resonant cavity frequencies where the combination of two-photon driving and Purcell-enhanced decay stabilizes the system into the subradiant and superradiant states, respectively. By considering the case of nondegenerate emitters and exploring the parameter space of the system, the authors show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance. The authors provide a global perspective of this landscape of mechanisms and contribute analytical characterizations and insights into these phenomena, establishing connections with previous reports in the literature and discussing how some of these effects can be optically detected. [Full article]
