Curator's Take
This groundbreaking work represents a major leap forward in controlling collective quantum behavior by creating ordered atomic arrays that act as programmable many-body quantum systems. Unlike previous experiments limited to simple point-like ensembles, these researchers achieved precise spatial control over atoms at subwavelength distances, enabling them to observe and manipulate complex correlations between atoms as they collectively emit and absorb light. The discovery of ferromagnetic-like superradiance and antiferromagnetic-like subradiance in these ordered arrays opens entirely new avenues for quantum technologies, potentially leading to more efficient quantum memories, enhanced photon capture systems, and novel approaches to generating entanglement between atoms and light. This platform essentially creates a bridge between atomic physics and condensed matter physics, offering researchers a powerful new tool for exploring quantum many-body phenomena in a highly controllable setting.
— Mark Eatherly
Summary
When quantum emitters couple indistinguishably to light, they can synchronize into a collective light matter system with radiative properties profoundly different from those of independent particles. To date, the resulting collective effects have largely been confined to point like or homogeneous ensembles. Here, we open access to a qualitatively new collective regime by realizing geometrically ordered, spatially extended atom arrays with subwavelength spacing. This establishes a fundamentally new platform in which collective emission is no longer confined to a single Dicke mode but instead emerges from an ordered network of photon mediated interactions. We find that 2D atom arrays undergo strong super and subradiant emission. Despite subwavelength spacing, we achieve site resolved imaging and directly observe the buildup of spatial correlations, demonstrating the transformation of cooperative decay into a strongly correlated many-body process. We observe extensive scaling of superradiance, uncover superradiant revivals, and reveal the ferromagnetic nature of superradiance and the antiferromagnetic nature of subradiance. Our results realize a novel programmable platform for exploring and utilizing dissipative many-body quantum physics, opening new possibilities for photon capture, storage, and atom photon entanglement.