Imany Poolad, Jaramillo-Villegas Jose A, Odele Ogaga D, Han Kyunghun, Leaird Daniel E, Lukens Joseph M, Lougovski Pavel, Qi Minghao, Weiner Andrew M
Opt Express. 2018 Jan 22;26(2):1825-1840. doi: 10.1364/OE.26.001825.
Quantum frequency combs from chip-scale integrated sources are promising candidates for scalable and robust quantum information processing (QIP). However, to use these quantum combs for frequency domain QIP, demonstration of entanglement in the frequency basis, showing that the entangled photons are in a coherent superposition of multiple frequency bins, is required. We present a verification of qubit and qutrit frequency-bin entanglement using an on-chip quantum frequency comb with 40 mode pairs, through a two-photon interference measurement that is based on electro-optic phase modulation. Our demonstrations provide an important contribution in establishing integrated optical microresonators as a source for high-dimensional frequency-bin encoded quantum computing, as well as dense quantum key distribution.
来自芯片级集成光源的量子频率梳是可扩展且稳健的量子信息处理（QIP）的有前途的候选者。然而，要将这些量子梳用于频域量子信息处理，需要在频率基上证明纠缠，即表明纠缠光子处于多个频率 bin 的相干叠加态。我们通过基于电光相位调制的双光子干涉测量，使用具有 40 个模式对的片上量子频率梳对量子比特和量子三态的频率 bin 纠缠进行了验证。我们的演示为将集成光学微谐振器确立为高维频率 bin 编码量子计算以及密集量子密钥分发的光源做出了重要贡献。
