论文标题
易耐故障定向耦合器，用于硅光子整合电路中的状态操作
Fault-Tolerant Directional Couplers for State Manipulation in Silicon Photonic-Integrated Circuits
论文作者
论文摘要
光子集成电路在当前和未来的应用中起着核心作用，例如通信，传感，范围和信息处理。光子量子计算也可能需要集成的光学体系结构，以提高稳定性，可扩展性和性能。易耐故障量子计算规定非常准确且健壮的量子门。在这项工作中，我们利用一种新型的失调调节复合段的方案来展示光子整合波导中单量门门的高效率定向耦合器。提出了针对波长变化的敏感性以及波导宽度和深度中现实世界几何制造误差的敏感性的特定设计。实验证明了增强的波长公差。该概念显示出作为集成量子光学体系结构的一部分扩展高保真门的巨大希望。
Photonic integrated circuits play a central role in current and future applications such as communications, sensing, ranging, and information processing. Photonic quantum computing will also likely require an integrated optics architecture for improved stability, scalability, and performance. Fault-tolerant quantum computing mandates very accurate and robust quantum gates. In this work, we demonstrate high-fidelity directional couplers for single-qubit gates in photonic integrated waveguides, utilizing a novel scheme of detuning-modulated composite segments. Specific designs for reduced sensitivity to wavelength variations and real-world geometrical fabrication errors in waveguides width and depth are presented. Enhanced wavelength tolerance is demonstrated experimentally. The concept shows great promise for scaling high fidelity gates as part of integrated quantum optics architectures.
