论文标题
在具有独立单个光子的量子干涉仪中分散取消
Dispersion cancellation in a quantum interferometer with independent single photons
论文作者
论文摘要
执行适当的量子信息处理的关键技术是在独立的单个光子之间获得高可见性量子干扰。影响量子干扰的关键元素之一是当单个光子通过分散介质时发生的组速度分散。我们从理论上和实验上证明，如果两个独立的单个光子经历了相同量的脉冲拓宽，则可以取消组速度分散对两光子干扰的影响。该分散取消效果可以推广到具有多个独立单个光子的多路线线性干涉仪。由于多路径量子干涉仪是量子通信，光子量子计算和玻色子采样应用的核心，因此我们的工作应在量子信息科学中找到广泛的适用性。
A key technique to perform a proper quantum information processing is to get a high visibility quantum interference between independent single photons. One of the crucial elements that affects the quantum interference is a group velocity dispersion that occurs when the single photons pass through a dispersive medium. We theoretically and experimentally demonstrate that an effect of group velocity dispersion on the two-photon interference can be cancelled if two independent single photons experience the same amount of pulse broadening. This dispersion cancellation effect can be generalized to a multi-path linear interferometer with multiple independent single photons. As multi-path quantum interferometers are at the heart of quantum communication, photonic quantum computing, and boson sampling applications, our work should find wide applicability in quantum information science.
