论文标题

纠缠增强的光力传感

Entanglement-Enhanced Optomechanical Sensing

论文作者

Xia, Yi, Agrawal, Aman R., Pluchar, Christian M., Brady, Anthony J., Liu, Zhen, Zhuang, Quntao, Wilson, Dalziel J., Zhang, Zheshen

论文摘要

在力,加速度和磁场的超敏度测量中,光学机制已被利用。光学传感的基本限制已经进行了广泛的研究,现在已经充分理解了 - 骨光学和机械模式的固有不确定性,以及由两者之间的相互作用引起的反向噪声,决定了标准量子限制(SQL)。已经开发了基于非经典探针,基于原位的潮汐挤压光和反向效率测量的高级技术,以克服单个光学机械传感器的SQL。一种增强光学机械传感的替代性,更简单的方法取决于多个传感器进行的关节测量。在这种配置中,尚未探讨克服关节测量中基本限制的途径。在这里,我们证明了用纠缠探针在多个光力传感器上进行的联合力量测量可以改善热噪声优势制度中的带宽或射击噪声命名为主制度的灵敏度。此外,我们用敏感性带宽产物量化了纠缠探针的总体性能,并观察到与经典探针相比增加了25%。所展示的纠缠增强的光力传感可以为惯性导航,声学成像和寻找新物理学的新功能。

Optomechanical systems have been exploited in ultrasensitive measurements of force, acceleration, and magnetic fields. The fundamental limits for optomechanical sensing have been extensively studied and now well understood -- the intrinsic uncertainties of the bosonic optical and mechanical modes, together with the backaction noise arising from the interactions between the two, dictate the Standard Quantum Limit (SQL). Advanced techniques based on nonclassical probes, in-situ pondermotive squeezed light, and backaction-evading measurements have been developed to overcome the SQL for individual optomechanical sensors. An alternative, conceptually simpler approach to enhance optomechanical sensing rests upon joint measurements taken by multiple sensors. In this configuration, a pathway toward overcoming the fundamental limits in joint measurements has not been explored. Here, we demonstrate that joint force measurements taken with entangled probes on multiple optomechanical sensors can improve the bandwidth in the thermal-noise-dominant regime or the sensitivity in shot-noise-dominant regime. Moreover, we quantify the overall performance of entangled probes with the sensitivity-bandwidth product and observe a 25% increase compared to that of the classical probes. The demonstrated entanglement-enhanced optomechanical sensing could enable new capabilities for inertial navigation, acoustic imaging, and searches for new physics.

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