论文标题
使用杂交量子加速度计三合会跟踪矢量加速度
Tracking the Vector Acceleration with a Hybrid Quantum Accelerometer Triad
论文作者
论文摘要
在许多领域，强大而准确的加速跟踪仍然是一个挑战。对于地球物理和经济地质学，精确的重力映射需要在板载传感器以及准确的定位和导航系统。基于冷原子的量子惯性传感器可以潜在地提供此类高精度仪器。但是，当前的标量仪器需要与矢量数量的精确对齐。在这里，我们提出了第一个混合三轴加速度计，利用量子优势来测量整个加速度向量，通过将三个正交原子干涉仪测量与经典导航级加速度计三合会相结合。它的超低偏置允许在长时间尺度上跟踪加速度向量 - 在我们的经典加速度计上稳定性提高了50倍（$ 6 \ times 10^{ - 8} 〜g $）。我们以高数据速率（1 kHz）记录加速度向量，绝对幅度精度低于10 $μg$，指向精度为4 $μ$ rad。这铺平了使用量子传感器朝着未来的互动应用程序铺平道路，并突出了它们作为未来惯性导航单元的潜力。
Robust and accurate acceleration tracking remains a challenge in many fields. For geophysics and economic geology, precise gravity mapping requires onboard sensors combined with accurate positioning and navigation systems. Cold-atom-based quantum inertial sensors can potentially provide such high-precision instruments. However, current scalar instruments require precise alignment with vector quantities. Here, we present the first hybrid three-axis accelerometer exploiting the quantum advantage to measure the full acceleration vector by combining three orthogonal atom interferometer measurements with a classical navigation-grade accelerometer triad. Its ultra-low bias permits tracking the acceleration vector over long timescales -- yielding a 50-fold improvement in stability ($6 \times 10^{-8}~g$) over our classical accelerometers. We record the acceleration vector at a high data rate (1 kHz), with absolute magnitude accuracy below 10 $μg$, and pointing accuracy of 4 $μ$rad. This paves the way toward future strapdown applications with quantum sensors and highlights their potential as future inertial navigation units.
