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相关概念视频

Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...

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相关实验视频

Updated: Jul 19, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

一个合良好的半连续原子激光器.

Hagley1, Deng, Kozuma

  • 1National Institute of Standards and Technology, Gaithersburg, MD 20899, USA. Georgia Southern University, Statesboro, GA 30460, USA. Institute of Physics, University of Tokyo, Tokyo 153-8902, Japan.

Science (New York, N.Y.)
|March 12, 1999
PubMed
概括

研究人员使用刺激拉曼过程从斯-爱因斯坦凝聚物 (BEC) 中提取了原子. 这种技术通过重叠原子波包来创建一个高度定向的物质波.

科学领域:

  • 原子,分子和光学物理学
  • 量子光学是一种量子光学.
  • 凝结体物理 凝结体物理

背景情况:

  • 波斯-爱因斯坦凝聚物 (Bose-Einstein condensate,简称BEC) 是物质在极低温度下形成的量子状态.
  • 控制和操纵BEC对于量子技术至关重要.
  • 以前从BEC中提取原子的方法往往缺乏精确的动量控制.

研究的目的:

  • 展示一种从斯-爱因斯坦凝结物中提取原子的新方法.
  • 为了在提取的原子分数上实现精确的动量控制.
  • 从凝聚物中产生一个高度定向的物质波.

主要方法:

  • 利用一个连贯的,刺激的拉曼过程,将被困和未被困的磁子层结合起来.
  • 采用光学拉曼脉冲来驱动原子过渡.
  • 研究了脉冲输出合速率对波包重叠的影响.

主要成果:

  • 成功地从一个被困的BEC中提取了原子.
  • 输出合的 BEC 分数表现出明确的动量.
  • 通过优化脉冲输出合速率,通过提取的原子波包实现了强大的重叠.

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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

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11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

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Last Updated: Jul 19, 2026

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Published on: February 6, 2014

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

结论:

  • 演示的刺激拉曼过程为BEC原子提取提供了一种可控的方法.
  • 这种技术可以形成高度定向的,准连续的物质波.
  • 这些发现对原子光学和量子信息处理有影响.