论文标题
通过时间门控光子检测的非高斯国家生成
Non-Gaussian state generation with time-gated photon detection
论文作者
论文摘要
非高斯光状态在容忍和通用光学量子计算中至关重要，通常是由使用光子检测器的先驱方案生成的。最近，理论上表明，光子探测器的大正时抖动会恶化产生的非高斯状态的纯度[T. T. sonoyama，$ \ textit {et al} $。，物理。 Rev. a $ \ textbf {105} $，043714（2022）]。在这项研究中，我们通过时间门控光子检测产生具有wigner负性的非高斯州。我们使用快速的光学开关进行时间门控，以有效地改善基于从50 ns到10 ns的过渡边缘传感器的光子分辨检测器的定时抖动。结果，我们生成的非高斯状态，wigner负性为$ -0.011 \ pm 0.004 $，如果没有时间门控光子检测方法，就无法观察到。这些结果首次证实了计时抖动对非高斯国家生成的影响，并提供了有前途的高纯度非高斯国家生成的方法。
Non-Gaussian states of light, which are essential in fault-tolerant and universal optical quantum computation, are typically generated by a heralding scheme using photon detectors. Recently, it is theoretically shown that the large timing jitter of the photon detectors deteriorates the purity of the generated non-Gaussian states [T. Sonoyama, $\textit{et al}$., Phys. Rev. A $\textbf{105}$, 043714 (2022)]. In this study, we generate non-Gaussian states with Wigner negativity by time-gated photon detection. We use a fast optical switch for time gating to effectively improve the timing jitter of a photon-number-resolving detector based on transition edge sensor from 50 ns to 10 ns. As a result, we generate non-Gaussian states with Wigner negativity of $-0.011\pm 0.004$, which cannot be observed without the time-gated photon detection method. These results confirm the effect of the timing jitter on non-Gaussian state generation experimentally for the first time and provide the promising method of high-purity non-Gaussian state generation.
