Artificial lattices of coherently coupled macroscopic states are at the heart of applications ranging from solving hard combinatorial optimization problems to simulating complex many-body physical systems. The size and complexity of the problems scale with the extent of coherence across the lattice. Although the fundamental limit of spatial coherence depends on the nature of the couplings and lattice parameters, it is usually engineering constraints that define the size of the system. Here, we engineer polariton condensate lattices with active control on the spatial arrangement and condensate density that results in near-diffraction limited emission, and spatial coherence that exceeds by nearly two orders of magnitude the size of each individual condensate. We use these advancements to unravel the dependence of spatial correlations between polariton condensates on the lattice geometry.

中文翻译：

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极化子冷凝物晶格中的工程空间相干性

相干耦合的宏观状态的人工晶格是从解决硬组合优化问题到模拟复杂的多体物理系统的应用程序的核心。问题的大小和复杂性随整个网格的连贯程度而定。尽管空间连贯性的基本限制取决于耦合和晶格参数的性质，但通常是工程约束条件会定义系统的大小。在这里，我们对极化子凝结水晶格进行了工程设计，对空间排列和凝结水密度进行了主动控制，导致了近衍射极限发射，并且空间相干性超出了每个凝结水的大小近两个数量级。