arXiv 2406.166222024-06quant-phphysics.optics

在单个Si₃N₄回音壁模式谐振器中跨不同模式族同时生成量子频率梳

Simultaneous Generation of Quantum Frequency Combs across Distinct Modal Families in a Single $Si_3 N_4$ Whispering Gallery Mode Resonator

Bo Ji, Yongjun Yang, Tengfei Wu, Nianqin Li, Guangqiang He

备注：: 20 pages, 9 figures

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AI总结：

本文提出在单个氮化硅回音壁模式谐振器中，通过空间光调制或逆向设计模式转换器调制泵浦模式，实现跨不同模式族同时生成量子频率梳，为片上高密度纠缠集成提供简单低成本方案。

摘要：

量子频率梳（QFCs）是用于多模纠缠（例如簇态）的多功能资源，对量子通信和量子计算至关重要。片上回音壁模式谐振器（WGMRs）能够在超低阈值功率下生成这些态。本工作展示了使用单个片上氮化硅WGMR在不同模式族中同时生成多个QFC。本文提出了一种半径为240 μm的微环谐振器，能够在130至260 THz频率范围内支持四个模式族以进行一致性调控。结果表明，通过精心设计氮化硅WGMR的结构，可以利用单色泵浦光在不同模式族中同时生成量子纠缠频率梳。这是通过使用空间光调制器（SLM）或片上逆向设计模式转换器来调制泵浦模式轮廓实现的。该方法为在芯片上实现更高密度的纠缠集成提供了一种简单且低成本的方式。

英文摘要：

Quantum frequency combs (QFCs) are versatile resources for multi-mode entanglement, such as cluster states, crucial for quantum communication and computation. On-chip whispering gallery mode resonators (WGMRs) can generate these states at ultra-low threshold power. This work demonstrates the simultaneous generation of multiple QFCs using a single on-chip silicon nitride WGMR across distinct modal families. It presents a micro-ring resonator with a radius of 240 $\mathrm{μm}$, capable of supporting four modal families within the 130 to 260 $\mathrm{THz}$ frequency range for consistency regulation. The results indicate that, by carefully designing the structure of silicon nitride WGMRs, it is possible to generate quantum entangled frequency combs across distinct modal families simultaneously using monochromatic pump light. It is achieved by modulating the pump mode profiles with a spatial light modulator (SLM) or an on-chip inverse-designed mode converter. This approach offers a simple and low-cost method to achieve higher-density entanglement integration on-chip.

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