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Quantum metrology with precision reaching beyond1/N-scaling throughN-probe entanglement-generating interactions
Physical Review A ( IF 2.6 ) Pub Date : 2021-07-19 , DOI: 10.1103/physreva.104.012607
Xing Deng , Shou-Long Chen , Mao Zhang , Xiao-Fan Xu , Jing Liu , Zhi Gao , Xiao-Chun Duan , Min-Kang Zhou , Lushuai Cao , Zhong-Kun Hu

Nonlinear interactions are recognized as potential resources for quantum metrology, facilitating parameter estimation precisions that scale as the exponential Heisenberg limit of 2N. We explore such nonlinearity and propose an associated quantum measurement scenario based on the nonlinear interaction of N-probe entanglement-generating form. This scenario provides an enhanced precision scaling of DN/(N1)! with D>2 a tunable parameter. In addition, it can be readily implemented in a variety of experimental platforms and applied to measurements of a wide range of quantities, including local gravitational acceleration g, magnetic field, and its higher-order gradients.

中文翻译:

通过N-探针纠缠-产生相互作用,精确度超过1/N-scaling的量子计量学

非线性相互作用被认为是量子计量学的潜在资源,有助于提高参数估计精度,其可扩展为指数海森堡极限 2-N. 我们探索了这种非线性,并提出了一个基于非线性相互作用的相关量子测量方案。N-探针纠缠生成形式。此方案提供了增强的精度缩放D-N/(N-1)D>2一个可调参数。此外,它可以很容易地在各种实验平台上实施,并应用于测量范围广泛的量,包括局部重力加速度G、磁场及其高阶梯度。
更新日期:2021-07-20
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