论文标题
旋转感测在最终极限
Rotation sensing at the ultimate limit
论文作者
论文摘要
传统的经典传感器在许多领域都接近其最大敏感性水平。然而，这些水平仍然远非量子力学决定的最终限制。量子传感器通过利用量子状态对环境的显着敏感性来向前一步。在这里，我们专注于传感旋转，这是广泛应用的主题。通过诉诸估计理论的基本工具，我们得出了在估计未知旋转轴的方向和围绕其旋转的角度方面实现最终灵敏度的状态。通过这些最佳状态获得的临界增强应使它们成为下一代旋转传感器中不可或缺的成分，而旋转传感器现在正在开花。
Conventional classical sensors are approaching their maximum sensitivity levels in many areas. Yet these levels still are far from the ultimate limits dictated by quantum mechanics. Quantum sensors promise a substantial step ahead by taking advantage of the salient sensitivity of quantum states to the environment. Here, we focus on sensing rotations, a topic of broad application. By resorting to the basic tools of estimation theory, we derive states that achieve the ultimate sensitivities in estimating both the orientation of an unknown rotation axis and the angle rotated about it. The critical enhancement obtained with these optimal states should make of them an indispensable ingredient in the next generation of rotation sensors that is now blossoming.
