Tunable quantum interference using a topological source of indistinguishable photon pairs
Tunable quantum interference using a topological source of indistinguishable photon pairs
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DOI：
10.1038/s41566-021-00810-1
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发表时间：
2021-05-10
期刊：
影响因子：
35
通讯作者：
Hafezi, Mohammad
中科院分区：
文献类型：
--
作者：
Mittal, Sunil;Orre, Venkata Vikram;Hafezi, Mohammad
量子光源，特别是对所有自由度都不可区分的关联光子对，是光子量子计算和模拟的基本资源。尽管最近已经使用集成光子学实现了这种源，但它们调节产生的光子之间的光谱和时间相关性的能力有限，因为它们依赖于单个组件，如环形谐振器。在这里，我们演示了在一个包括二维谐振器阵列的拓扑系统中，使用双抽运自发四波混频的不可分辨光子对的可调谐来源。我们利用拓扑边态的线性色散来调节光谱带宽(约3.5倍)，从而通过调节两个泵浦频率来调节产生的光子之间的量子干涉。我们演示了能量-时间纠缠，并通过数值模拟，证实了我们的源的拓扑健壮性。我们的结果可能导致可调谐的、用于光子量子技术的频率复用量子光源。不可分辨的光子对是通过在呈现拓扑边缘状态的二维环形谐振器阵列中的四波混频而产生的。它们显示出可调的光谱-时间相关性和对制造障碍的稳健性。
Sources of quantum light, in particular correlated photon pairs that are indistinguishable for all degrees of freedom, are the fundamental resource for photonic quantum computation and simulation. Although such sources have been recently realized using integrated photonics, they offer limited ability to tune the spectral and temporal correlations between generated photons because they rely on a single component, such as a ring resonator. Here, we demonstrate a tunable source of indistinguishable photon pairs using dual-pump spontaneous four-wave mixing in a topological system comprising a two-dimensional array of resonators. We exploit the linear dispersion of the topological edge states to tune the spectral bandwidth (by about 3.5x), and thereby, to tune quantum interference between generated photons by tuning the two pump frequencies. We demonstrate energy-time entanglement and, using numerical simulations, confirm the topological robustness of our source. Our results could lead to tunable, frequency-multiplexed quantum light sources for photonic quantum technologies.Indistinguishable photon pairs are generated via four-wave mixing in a two-dimensional array of ring resonators that exhibit topological edge states. They show tunable spectral-temporal correlations and robustness against fabrication disorders.