光镊阵列中用于分布式传感的可编程腔压缩
Programmable Cavity Squeezing for Distributed Sensing in a Tweezer Array
AI总结：
该研究提出利用腔中光镊阵列构建可编程腔压缩方案，实现分布式传感的纠缠调控，可将差分Ramsey干涉测量的相位不确定性降至标准量子极限以下，为分布式传感提供可扩展的纠缠构建途径。
AI中文摘要：
最先进的原子干涉仪的场传感受限于使用并行工作的无关联器件。我们可通过分布式传感协议克服这一限制，该协议在承载信号的空间模式中构建空间分离器件间的量子关联。我们表明，腔中的光镊阵列为构建分布式传感用的量子态提供了理想的测试平台，可在原子团内部及团之间产生纠缠。局域与团间腔介导交换的竞争，使团间耦合的符号和空间模式可用于选择压缩模式。对于两个原子团，正耦合产生均匀的集体压缩，而负耦合产生强的交错非局域压缩。半经典分析揭示了类似反扭曲的相空间流，其在性质上不同于标准的单轴扭曲。该分析和结果可进一步推广到更多原子团的情况。我们将该方案应用于覆盖整个2π范围的公共相位噪声下的差分Ramsey干涉测量，所得的交错态将相位不确定性降至标准量子极限以下，椭圆估计器接近Cramér-Rao界。这些结果确立了可编程腔相互作用作为适配分布式信号的可扩展纠缠构建途径的可行性。
英文摘要：
Field sensing with state-of-the-art atom interferometers is restricted to the use of uncorrelated devices op- erating in parallel. We can overcome this limitation by using distributed sensing protocols where quantum correlations among spatially-separated devices are engineered in the spatial mode carrying the signal. We show that a tweezer array in a cavity offers an ideal testbed to engineer quantum states for distributed sensing, with the possibility to generate entanglement both within and between the clouds. The competition between local and intercloud cavity-mediated exchange allows the sign and spatial pattern of the intercloud couplings to select the squeezed mode. For two ensembles, positive coupling produces uniform collective squeezing, whereas negative coupling generates strong staggered, nonlocal squeezing. A semiclassical analysis reveals a counter-twisting- like phase-space flow, qualitatively distinct from standard one-axis twisting. The analysis and results can be further generalized to a larger number of ensembles. We apply the scheme to differential Ramsey interferometry with common phase noise spanning the full 2 πrange, the resulting staggered states reduce the phase uncertainty below the standard quantum limit, with an ellipse estimator approaching the Cramèr-Rao bound. These results establish programmable cavity interactions as a scalable route to entanglement tailored to distributed signals.
