Gao Jun, Qiao Lu-Feng, Lin Xiao-Feng, Jiao Zhi-Qiang, Feng Zhen, Zhou Zheng, Gao Zhen-Wei, Xu Xiao-Yun, Chen Yuan, Tang Hao, Jin Xian-Min
Opt Express. 2016 Jun 13;24(12):12607-16. doi: 10.1364/OE.24.012607.
Quantum interference and quantum correlation, as two main features of quantum optics, play an essential role in quantum information applications, such as multi-particle quantum walk and boson sampling. While many experimental demonstrations have been done in one-dimensional waveguide arrays, it remains unexplored in higher dimensions due to tight requirement of manipulating and detecting photons in large-scale. Here, we experimentally observe non-classical correlation of two identical photons in a fully coupled two-dimensional structure, i.e. photonic lattice manufactured by three-dimensional femtosecond laser writing. Photon interference consists of 36 Hong-Ou-Mandel interference and 9 bunching. The overlap between measured and simulated distribution is up to 0.890 ± 0.001. Clear photon correlation is observed in the two-dimensional photonic lattice. Combining with controllably engineered disorder, our results open new perspectives towards large-scale implementation of quantum simulation on integrated photonic chips.
量子干涉和量子关联作为量子光学的两个主要特征，在量子信息应用中起着至关重要的作用，例如多粒子量子行走和玻色子采样。虽然在一维波导阵列中已经进行了许多实验演示，但由于在大规模操纵和检测光子方面的严格要求，在更高维度上仍未得到探索。在这里，我们通过实验观察到在一个完全耦合的二维结构中两个相同光子的非经典关联，即由三维飞秒激光写入制造的光子晶格。光子干涉由36次Hong-Ou-Mandel干涉和9次聚束组成。测量分布与模拟分布之间的重叠高达0.890±0.001。在二维光子晶格中观察到了清晰的光子关联。结合可控工程无序，我们的结果为在集成光子芯片上大规模实现量子模拟开辟了新的前景。
