Matter-wave interferometry and spectroscopy of optomechanical resonators offer complementary advantages. Interferometry with cold atoms is employed for accurate and long-term stable measurements, yet it is challenged by its dynamic range and cyclic acquisition. Spectroscopy of optomechanical resonators features continuous signals with large dynamic range, however it is generally subject to drifts. In this work, we combine the advantages of both devices. Measuring the motion of a mirror and matter waves interferometrically with respect to a joint reference allows us to operate an atomic gravimeter in a seismically noisy environment otherwise inhibiting readout of its phase. Our method is applicable to a variety of quantum sensors and shows large potential for improvements of both elements by quantum engineering.

光机械谐振器的物质波干涉法和光谱法具有互补的优势。采用冷原子干涉法可进行准确和长期稳定的测量，但它的动态范围和周期性采集对其构成挑战。光机械谐振器的光谱学特征是具有大动态范围的连续信号，但是通常会发生漂移。在这项工作中，我们结合了两种设备的优点。通过干涉测量相对于联合参考的反射镜和物质波的运动，我们可以在地震嘈杂的环境中操作原子重力仪，否则会阻止其相位的读出。我们的方法适用于各种量子传感器，并显示出通过量子工程改进两种元素的巨大潜力。