论文标题
非线性信号失真纠正通过量子传感
Nonlinear Signal Distortion Corrections Through Quantum Sensing
论文作者
论文摘要
具有准确的栅极生成对于精确控制量子系统至关重要。生成的门通常患有线性和非线性失真。以前的工作已经证明了如何使用量子纠正线性频率失真，但尚未评论如何处理非线性失真。这是一个重要的问题，因为我们表明，来自RF电子的非线性振幅扭曲可能会影响狂犬病脉冲多达10％。我们提出的工作表明了如何将转基矩置量置于高度敏感的低温检测器中来表征这些非线性振幅失真。我们表明，在700 MHz范围内，校正可以使这些错误降至<1％。这种校正技术提供了一种最小化信号扭曲效果的方法，并且可以轻松地应用于宽带对照脉冲以产生更高的保真度任意量子门。
Having accurate gate generation is essential for precise control of a quantum system. The generated gate usually suffers from linear and nonlinear distortion. Previous works have demonstrated how to use a qubit to correct linear frequency distortions but have not commented on how to handle nonlinear distortions. This is an important issue as we show that nonlinear amplitude distortions from the RF electronics can affect Rabi pulses by as much as 10%. We present work that demonstrates how a transmon qubit can be used as a highly sensitive cryogenic detector to characterize these nonlinear amplitude distortions. We show that a correction can drive these errors down to <1% over a 700 MHz range. This correction technique provides a method to minimize the effects of signal distortions and can be easily applied to broadband control pulses to produce higher fidelity arbitrary quantum gates.
