噪声存在下通过约瑟夫森结开关电流检测信号
Detection of signals in presence of noise through Josephson junction switching currents
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中文总结 AI 辅助
本文研究约瑟夫森结在噪声中检测正弦信号，通过线性斜坡偏置电流并分析开关电流，发现检测效率随斜坡速率增加而提升，该方法稳健且可利用有限时间收集数据。
中文摘要 AI 辅助
约瑟夫森结可用于在存在高斯噪声的情况下揭示正弦信号。为模拟实际设置，检测通过线性斜坡上升偏置电流直至发生向有限电压的开关来进行；对所得开关电流的分析可用于判断谐波驱动是否存在。信号在两种条件下施加：初始相位未知（非相干策略）和初始相位已知（相干策略）。在两种条件下，通过信噪比（以Kumar-Carrol指数估计）进行的检测效率分析表明，对约瑟夫森结斜坡速率的依赖是有益的，尤其是在相对较快的速度下。可以得出结论，收集开关电流是一种稳健的技术，因此可以利用预定有限时间来收集数据的优势。
英文摘要
Josephson junctions can be employed to reveal a sinusoidal signal in presence of Gaussian noise. To mimic realistic setups, the detection is performed linearly ramping the bias current until a switch to the finite voltage occurs; the analysis of the resulting switching currents can be exploited to decide about the presence of the harmonic drive. The signal is applied in two conditions: with an unknown initial phase (incoherent strategy) and with a known initial phase (coherent strategy). In both conditions, the analysis of the efficiency of the detection, performed through the signal-to-noise ratio, as estimated by the Kumar-Carrol index, shows that the dependence upon the Josephson junction ramp rate is beneficial, especially for relatively fast speed. One can conclude that the collection of the switching currents is a robust technique, and thus it is possible to exploit the advantages of a predetermined finite time to collect the data.
发表机构
- University of Yaoundé I（雅温得第一大学）
- University of Douala（杜阿拉大学）
- University of Sannio（萨尼奥大学）
机构由 AI 辅助整理，请以论文原文为准。
