标题： 使用双势阱阵列中的原子进行计量学 显示英文标题

标题： Metrology using atoms in an array of double-well potentials

摘要： 量子效应，如纠缠、爱因斯坦-波多尔斯基-罗森操控和贝尔关联，可以将计量灵敏度提升到标准量子极限以上。这些关联通常是通过原子或分子之间的相互作用，或者激光脉冲通过双折射晶体时产生的。在这里，我们考虑了一种生成可扩展的多体纠缠态的替代方法，并证明了它们在量子增强计量中的可用性。我们的装置是一个一维(1D)的双势阱阵列，其中包含独立且不相关的玻色-爱因斯坦凝聚体。分束变换在相邻势阱之间混合信号，并通过洪-欧-曼德尔效应的多体等效方式产生强纠缠态。我们证明这种纠缠可以提高量子传感器的灵敏度。在我们的分析中，我们考虑了原子涨落的影响，并确定了可以达到量子克拉默-拉奥界限的最佳测量方法。 显示英文摘要

摘要： Quantum effects, such as entanglement, Einstein-Podolsky-Rosen steering, and Bell correlations, can enhance metrological sensitivity beyond the standard quantum limit. These correlations are typically generated through interactions between atoms or molecules, or during the passage of a laser pulse through a birefringent crystal. Here, we consider an alternative method of generating scalable, many-body entangled states, and demonstrate their usability for quantum-enhanced metrology. Our setup is a one-dimensional (1D) array of double-well potentials holding independent and uncorrelated Bose-Einstein condensates. The beam-splitting transformation mixes the signal between adjacent wells and yields a strongly entangled state through a many-body equivalent of the Hong-Ou-Mandel effect. We demonstrate this entanglement can improve the sensitivity of quantum sensors. In our analysis, we account for the effects of atomic fluctuations and identify the optimal measurement that saturates the quantum Cramer-Rao bound.