线性光学纠缠门的普适保真度定律
Universal Fidelity Law for Linear-Optical Entangling Gates
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中文总结 AI 辅助
针对不完美光子源导致的线性光学纠缠门性能下降问题，提出以Hong-Ou-Mandel可见度和二阶相干度刻画多光子噪声的普适保真度定律，并经实验验证，为光子量子计算提供统一基准。
中文摘要 AI 辅助
不完美的光子源会降低基于干涉的线性光学纠缠门的性能。我们针对这些门推导出一个普适保真度定律，该定律由两个标准光源度量参数表示：Hong-Ou-Mandel可见度和二阶相干度。我们将多光子成分建模为噪声光子与信号光子之间的任意重叠。虽然信号-噪声重叠的不同取值会产生不同的误差结构，这些结构对应不同的物理平台，但所有情况都导致相同的保真度定律。我们在主动同步的CNOT门实验中测试了该模型，并与不同平台上已发表的结果进行了对比，且无需任何自由参数。该框架将光源表征转变为光子量子计算的统一基准。
英文摘要
Imperfect photon sources degrade the performance of interference-based linear-optical entangling gates. We derive a universal fidelity law for these gates in terms of two standard source metrics: Hong-Ou-Mandel visibility and second-order coherence. We model the multiphoton component as an arbitrary overlap between noise and signal photons. While different values of the signal-noise overlap produce different error structures, associated with different physical platforms, all result in the same fidelity law. We test the model on our actively synchronized CNOT-gate experiment and against published results across different platforms, with no free parameters. This framework turns source characterization into a unified benchmark for photonic quantum computing.
发表机构
- Weizmann Institute of Science（魏茨曼科学研究所）
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