标题： 通过量子干涉捕获混合频率纠缠的量子比特 显示英文标题

标题： Harnessing Hybrid Frequency-Entangled Qudits through Quantum Interference

摘要： 高维（HD）量子纠缠扩展了希尔伯特空间，为量子信息处理提供了具有增强容量和抗错误能力的稳健框架。 在本工作中，我们提出了一种新型的高维频域纠缠态，即混合频率纠缠的夸德（HFEQ），通过洪-欧-曼（HOM）干涉生成，表现出离散变量（DV）和连续变量（CV）特性。 通过调节 HOM 干涉，我们生成并控制维度为$D=5,7,9,11$的 HFEQ，确认了它们的 DV 特性。 Franson 干涉仪确认了全局频率相关性，可见度超过 98%，并验证了单个频率模式内的 CV 纠缠，可见度大于 95%。 我们的研究结果对由量子干涉生成的频率纠缠夸德的物理本质提供了更深入的见解，并引入了一种新的资源用于 HD 时频量子信息处理。 显示英文摘要

摘要： High-dimensional (HD) quantum entanglement expands the Hilbert space, offering a robust framework for quantum information processing with enhanced capacity and error resilience. In this work, we present a novel HD frequency-domain entangled state, the hybrid frequency-entangled qudit (HFEQ), generated via Hong-Ou-Mandel (HOM) interference, exhibiting both discrete-variable (DV) and continuous-variable (CV) characteristics. By tuning HOM interference, we generate and control HFEQs with dimensions $D=5,7,9,11$, confirming their DV nature. Franson interferometry confirms the global frequency correlations with visibility exceeding 98% and verifies the CV entanglement within individual frequency modes with visibility greater than 95%. Our findings provide deeper insight into the physical nature of frequency-entangled qudits generated by quantum interference and introduce a novel resource for HD time-frequency quantum information processing.