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激光冷却原子    
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  laser cooling of atoms
    New Mechanisms for Laser Cooling of Atoms
    激光冷却原子新机制
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    The system has significant practice value of the object recognition , atmosphere supervising and laser cooling of atoms etc.
    该系统在目标识别、大气环境监测、激光冷却原子等应用中具有重要的价值。
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  laser cooling of atoms
The influence of momentum diffusion on laser cooling of atoms
      
Laser cooling of atoms in optical lattices including quantum statistics and dipole-dipole interactions
      
We present results of a study of frequency stabilization of a diode laser (λ = 780 nm) using the Doppler-free dichroic lock (DFDL) technique and its use for laser cooling of atoms.
      
Such a situation happens in the recently demonstrated laser cooling of atoms by velocity selective coherent population trapping.
      
  laser-cooling
We discuss extensively sympathetic cooling of the chain and the effect of anharmonicity on laser-cooling and quantum-information processing.
      
From these measurements we report hyperfine separations in the A-state, as important to laser-cooling spectroscopy, and centroidal transition frequencies for comparison with existing values.
      
We describe a laser-cooling experiment on Mg+ ions confined in an electromagnetic trap (Penning trap or rf trap) and give the preliminary experimental results.
      
We report some laser-cooling effects in a few172Yb+ ions held in a Paul trap.
      
At input powers of 840?mW (including 130?mW used for locking purposes) we generate 99?mW UV radiation with an intensity profile suitable for laser-cooling experiments.
      
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We summarize the latest developments in laser cooling, with emphasis on the physical principles underlying polarization gradient cooling, magnetic field induced cooling and velocity-selective coherent population trapping. The new mechanisms are compared with the traditional one.

本文综述了激光冷却原子的研究新进展,着重从物理图象上介绍了偏振梯度冷却、磁感应冷却和速度选择相干粒子数捕陷等新机制.文中还将新的冷却机制和传统冷却机制进行了对比.

This article analyzes the phase diagram of 4 He and λ phase transition of liquid 4 He. Discusses the sorts of the phase transition with vavious temperature and pressure. Indicates the fundamental cause about liquid 4 He named after quantum liquid. Introduces basic properties of HeⅠ, such as viscosity coefficent,thermal conductivity, absorption coefficent of sound, and studies with condensed gas model, then to elaborate on the abnormal properties of HeⅡ, Superfluiclity is the most important in all. In addition,...

This article analyzes the phase diagram of 4 He and λ phase transition of liquid 4 He. Discusses the sorts of the phase transition with vavious temperature and pressure. Indicates the fundamental cause about liquid 4 He named after quantum liquid. Introduces basic properties of HeⅠ, such as viscosity coefficent,thermal conductivity, absorption coefficent of sound, and studies with condensed gas model, then to elaborate on the abnormal properties of HeⅡ, Superfluiclity is the most important in all. In addition, introduces also some related adoanced applications, for example, superconductionity, atoms cooled by laser,quantum Hall Effect,etc.

分析了4He的相图和液体4He的λ相变 ,讨论了在不同的温度和压强下相变的类型 ,指出了液体4He被称为量子液体的基本原因 ,介绍了HeⅠ的基本特性 ,如粘滞系数、热导率 ,对声波的吸收系数 ,以及凝聚气体模型。阐述了HeⅡ的反常特性 ,其中最重要的是超流动性 ,另外 ,还介绍了与液体4He相关的几种前沿应用 ,如超导电性 ,激光冷却原子和量子霍耳效应等

Double-electrode-pair TEACO 2 laser has characteristics of high increment and large power of output . Especially it can produce two pulses of high power with adjustable time interval under a common vacuum condition.Applying photoelectric Packels cell to encode light double pulses ,the device produces left-hand or right-hand rotational polarized light by turn.Based on it the decoding system of double beam is designed. The system has significant practice value of the object recognition , atmosphere supervising...

Double-electrode-pair TEACO 2 laser has characteristics of high increment and large power of output . Especially it can produce two pulses of high power with adjustable time interval under a common vacuum condition.Applying photoelectric Packels cell to encode light double pulses ,the device produces left-hand or right-hand rotational polarized light by turn.Based on it the decoding system of double beam is designed. The system has significant practice value of the object recognition , atmosphere supervising and laser cooling of atoms etc.

双电极对脉冲TEACO2 激光器具有增益高 ,输出能量大等特点 ,特别是在不需要高真空条件下可获得时间间隔连续可调的 2个高强度光脉冲对。利用电光普克尔盒对双光束脉冲对进行脉冲编码 ,使其产生交替的左旋及右旋偏振光 ,在此基础上 ,设计双光束解码系统。该系统在目标识别、大气环境监测、激光冷却原子等应用中具有重要的价值。

 
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