Koong Zhe Xian, Cygorek Moritz, Scerri Eleanor, Santana Ted S, Park Suk In, Song Jin Dong, Gauger Erik M, Gerardot Brian D
SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
Centro de Cîencias Naturais e Humanas, Universidade Federal do ABC, Santo Andrè, São Paulo 09210-580, Brazil.
Sci Adv. 2022 Mar 18;8(11):eabm8171. doi: 10.1126/sciadv.abm8171.
Photon-mediated interactions between atoms can arise via coupling to a common electromagnetic mode or by quantum interference. Here, we probe the role of coherence in cooperative emission arising from two distant but indistinguishable solid-state emitters because of path erasure. The primary signature of cooperative emission, the emergence of "bunching" at zero delay in an intensity correlation experiment, is used to characterize the indistinguishability of the emitters, their dephasing, and the degree of correlation in the joint system that can be coherently controlled. In a stark departure from a pair of uncorrelated emitters, in Hong-Ou-Mandel-type interference measurements, we observe photon statistics from a pair of indistinguishable emitters resembling that of a weak coherent state from an attenuated laser. Our experiments establish techniques to control and characterize cooperative behavior between matter qubits using the full quantum optics toolbox, a key step toward realizing large-scale quantum photonic networks.
原子之间的光子介导相互作用可通过与共同的电磁模式耦合或量子干涉产生。在此，我们探究了相干性在因路径擦除而产生的两个遥远但不可区分的固态发射器的合作发射中的作用。合作发射的主要特征，即在强度关联实验中零延迟处出现的“聚束”，被用于表征发射器的不可区分性、它们的退相以及联合系统中可相干控制的关联程度。在与一对不相关发射器形成鲜明对比的情况下，在洪-欧-曼德尔型干涉测量中，我们观察到来自一对不可区分发射器的光子统计特性类似于来自衰减激光的弱相干态的光子统计特性。我们的实验建立了使用全量子光学工具箱来控制和表征物质量子比特之间合作行为的技术，这是实现大规模量子光子网络的关键一步。
