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相关概念视频

Control Systems01:10

Control Systems

1.2K
Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
At the heart...
1.2K

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相关实验视频

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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临界量子计量技术辅助实时反控制

Raffaele Salvia1,2, Mohammad Mehboudi2, Martí Perarnau-Llobet2

  • 1Scuola Normale Superiore, I-56127 Pisa, Italy.

Physical review letters
|June 30, 2023
PubMed
概括

适应性策略克服了量子计量学的局限性,实现了超出射击噪声极限的精度. 这项研究探讨了贝叶斯推理用于在量子临界点附近的多体系统中的参数估计.

科学领域:

  • 量子物理学的量子物理学
  • 统计力学就是统计力学.
  • 信息理论是信息理论.

背景情况:

  • 量子计量学旨在准确估计量子系统中的参数.
  • 多体系统中的量子临界点提供了增强的灵敏度.
  • 贝叶斯推理提供了一个框架,用于预先知识的参数估计.

研究的目的:

  • 使用贝叶斯推理研究量子测量学在量子临界点附近.
  • 确定非适应性策略在利用量子关键增强方面的局限性.
  • 开发和分析适应性策略,以克服这些局限性.

主要方法:

  • 对于非适应性策略来说,推导一个无效结果.
  • 对具有实时反控制的适应性策略的分析.
  • 在1D旋转Ising链和Bose-Hubbard网格中应用到参数估计.

主要成果:

  • 非适应性策略未能在具有有限的先前知识的大型系统中实现量子关键增强.
  • 适应性策略可以克服无效结果.
  • 通过适应性策略,可以实现次射噪声缩放,即使测量很少,且先前不确定性很大.

结论:

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  • 适应性策略对于利用测量学中的量子关键增强至关重要.
  • 实时反控制可实现超出标准量子极限的精度.
  • 这项工作为复杂量子系统中增强的参数估计提供了途径.