通过延迟泵浦模间四波混频缓解光子对源中的不可区分性问题
Mitigating indistinguishability issues in photon pair sources by delayed-pump Intermodal Four Wave Mixing
AI总结：
针对集成光子源因制造缺陷导致的光谱不可区分性问题，提出通过波导锥化和泵浦延迟控制为延迟泵浦IFWM源增加光谱可调性，可在实际制造公差下实现99.5%以上的独立源不可区分性。
摘要：
大规模独立、纯净且全同的预告式单光子源阵列是当今含噪声中等规模量子器件（NISQ）中普遍存在的组件。在研发愈发理想的光子源的竞赛中，多模波导中的延迟泵浦模间四波混频（IFWM）近期在所有这些指标上都展现出了创纪录的性能，成为集成光学中自发辐射源的基准。尽管如此，制造缺陷仍会破坏来自独立源的光子对的光谱不可区分性。本文中我们表明，通过对波导宽度进行锥形化设计并控制泵浦脉冲之间的延迟，我们为该光源增添了光谱可调性，同时仍保留了IFWM方案的所有创纪录指标。这一特性可用于在存在制造误差的情况下恢复光谱不可区分性。在波导尺寸的实际公差下，我们预测同一芯片上独立源之间的不可区分性>99.5%，且预告式洪-欧-曼德尔可见度的最大下降<0.35%。
英文摘要：
Large arrays of independent, pure and identical heralded single photon sources are ubiquitous in today's Noise Intermediate Scale Quantum devices (NISQ). In the race towards the development of increasingly ideal sources, delayed-pump Intermodal Four Wave Mixing (IFWM) in multimode waveguides has recently demonstrated record performances in all these metrics, becoming a benchmark for spontaneous sources in integrated optics. Despite this, fabrication imperfections still spoil the spectral indistinguishability of photon pairs from independent sources. Here we show that by tapering the width of the waveguide and by controlling the delay between the pump pulses, we add spectral tunability to the source while still inheriting all the record metrics of the IFWM scheme. This feature is used to recover spectral indistinuishability in presence of fabrication errors. Under realistic tolerances on the waveguide dimensions, we predict >99.5% indistinguishability between independent sources on the same chip, and a maximum degradation of the Heralded Hong Ou Mandel visibility <0.35 %.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
