论文标题
通过配件中的调音障碍提高原子钟的精度
Enhancing precision of atomic clocks by tuning disorder in accessories
论文作者
论文摘要
我们发现，具有涉及精度测量的附件的量子设备可以增强其计量精度，从而通过插入玻璃状疾病，意外或工程化来估算量子系统的未知参数。我们清楚地提到了如何在混乱的情况下还可以识别公正的估计器，以及如何通过量子cr {á} mer-rao不平等的精度来界定。我们比较了在系统中存在玻璃状疾病的情况下，比较了无偏估计器的最小标准偏差的基于Fisher信息的下限，而理想也是理想的。无障碍，情况。该现象可以提高某些测量设备的效率，例如原子钟。这些时钟的精度，在测量时间时，取决于两级原子频率的精确确定。如果原子中存在杂质并且可以将其建模为疾病参数，那么频率的测量可能比在理想的无疾病场景中更准确。此外，插入障碍可以减少初始探针纠缠含量的需求，这些探针是两量Qubit状态的副本，同时提供了障碍引起的增强。
We find that a quantum device having an accessory involving precision measurement can have an enhancement of its metrological precision in estimating an unknown parameter of the quantum system by insertion of glassy disorder, accidental or engineered. We clearly mention how an unbiased estimator can also be identified in a disordered situation, and how the precision thereof can be bounded by the quantum Cr{á}mer-Rao inequality. We compare the Fisher information-based lower bound of the minimum standard deviation of an unbiased estimator, in presence of glassy disorder in the system, with the same of an ideal, viz. disorder-free, situation. The phenomenon can boost the efficiency of certain measuring devices, such as atomic clocks. The precision of these clocks, when measuring time, hinges on the precise determination of the frequency of a two-level atom. In cases where impurities are present in the atom, and can be modeled as a disorder parameter, it is possible for the measurement of frequency to be more accurate than in an ideal, disorder-free scenario. Moreover, disorder insertion can reduce the requirement of entanglement content of the initial probes, which are copies of two-qubit states, along with providing a disorder-induced enhancement.
