论文标题
用纳米颗粒进行量子传感用于重力；当更大的时候更好
Quantum sensing with nanoparticles for gravimetry; when bigger is better
论文作者
论文摘要
在2020年第一次证明了悬浮的纳米球悬浮至量子基态的悬浮纳米球[1]之后，宏观量子传感器似乎即将上映。与其他量子系统相比，纳米球的大质量增强了纳米颗粒对重力和惯性力的敏感性。在这个角度，我们描述了具有光学悬浮的纳米颗粒[2]的实验特征及其提出的加速度传感的实用程序。悬浮的纳米颗粒平台独有的功能不仅能够实现量子噪声有限的转导能力，该量子量子学预测，以$ 10^{ - 15} $ 10^{ - 15} $ MS $^{ - 2} $ [3]达到敏感性，而且还具有长长的长期量子空间叠加量。这是在开发传感器（例如冷原子干涉仪）中的全球趋势，可以利用叠加或纠缠。由于这些现有量子技术的大量商业开发，我们讨论了将悬浮的纳米颗粒研究转化为应用的可行性。
Following the first demonstration of a levitated nanosphere cooled to the quantum ground state in 2020 [1], macroscopic quantum sensors are seemingly on the horizon. The nanosphere's large mass as compared to other quantum systems enhances the susceptibility of the nanoparticle to gravitational and inertial forces. In this viewpoint we describe the features of experiments with optically levitated nanoparticles [2] and their proposed utility for acceleration sensing. Unique to the levitated nanoparticle platform is the ability to implement not only quantum noise limited transduction, predicted by quantum metrology to reach sensitivities on the order of $10^{-15}$ms$^{-2}$ [3], but also long-lived quantum spatial superpositions for enhanced gravimetry. This follows a global trend in developing sensors, such as cold-atom interferometers, that exploit superposition or entanglement. Thanks to significant commercial development of these existing quantum technologies, we discuss the feasibility of translating levitated nanoparticle research into applications.
