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Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
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在NIST进行基于量子的真空计量.

Julia Scherschligt1, James A Fedchak1, Zeeshan Ahmed1

  • 1National Institute of Standards and Technology, 100 Bureau Dr. Gaithersburg, MD 20899.

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科学领域:

  • 计量学 计量学 计量学
  • 量子物理学 量子物理学 是一种量子物理学.
  • 光学科学 光学科学

背景情况:

  • 美国国家标准与技术研究所 (NIST) 专注于压力测量科学,特别是帕斯卡尔 (Pa).
  • 传统的压力传播方法正在根据现代科学进步重新评估.

研究的目的:

  • 研究巴斯卡计量学的现代光学技术.
  • 在量子性质和基本常数方面探索重新塑造帕斯卡.
  • 确保真空计量与全球转向量子计量学的转变保持一致.

主要方法:

  • 对多光子电离技术的研究.
  • 腔环减光谱的应用用于压力测量.
  • 使用低真空的光学腔体对气体折射率进行质疑.
  • 使用被困的激光冷却原子在高真空中计数背景粒子.

主要成果:

  • 探索用于精确压力测量的先进光学方法.
  • 制定策略,将压力标准与基本常数联系起来.
  • 在真空计量学中基于量子方法的进展.

结论:

  • 现代光学技术显示出对推进帕斯卡计量学的前景.
  • 使用量子属性重新打造帕斯卡将提高测量的一致性.
  • 尼斯特的研究为量子计量学的全球趋势做出了贡献.