论文标题
增强的测量精度，并在动态解耦过程中连续询问
Enhanced measurement precision with continuous interrogation during dynamical decoupling
论文作者
论文摘要
当应用于直流测量时，动态脱钩（DD）通常无效。在直接实现的过程中，DD在抑制噪声的同时也将DC信号无效。这项工作提出了一种相继电器方法（PRM），该方法能够在许多DD循环上连续询问直流信号。我们说明了用原子纺纱厂冷凝物应用于弱DC磁场的测量时的功效。接近标准量子极限（SQL）或海森堡极限（HL）的敏感性对于相干旋转状态（CSS）或挤压旋转状态（SSS）的可能性分别可实现，而环境实验室水平噪声则被DD抑制。我们的工作提供了一种实用方法来减轻DD对DC测量的局限性，并希望找到其他应用程序，以求助于量子传感和量子信息处理研究。
Dynamical decoupling (DD) is normally ineffective when applied to DC measurement. In its straightforward implementation, DD nulls out DC signal as well while suppressing noise. This work proposes a phase relay method (PRM) that is capable of continuously interrogating the DC signal over many DD cycles. We illustrate its efficacy when applied to measurement of a weak DC magnetic field with an atomic spinor Bose-Einstein condensate. Sensitivities approaching standard quantum limit (SQL) or Heisenberg limit (HL) are potentially realizable for a coherent spin state (CSS) or a squeezed spin state (SSS) of 10,000 atoms respectively, while ambient laboratory level noise is suppressed by DD. Our work offers a practical approach to mitigate the limitations of DD to DC measurement and will like find other applications for resorting coherence in quantum sensing and quantum information processing research.
