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法国高等师范学院电磁光谱学实验室的研究人员发明了一项用激光冷却和捕捉原子的技术,用此技术可制造精确度达10~(-16)的铯原子钟,这比现有的原子钟的精度(10~(-14))高两个数量级。研究人员首先用多束激光作用于原子蒸汽,使原子冷却到2.5×10~(-6)K,这时原子的运动速度平均为每秒1.2厘米,利用一个“原子阱”(一个重直装置)使原子在微波场下相互作用两次,在重力作用下,原子呈一次上升和一次下降的相对稳定运动。利用这一原理就可以制造精确度极高的铯原子钟。
Researchers at the Electro-Spectroscopy Laboratory at Institut de France have invented a technology that uses laser to cool and capture atoms, which can produce cesium atomic clocks with an accuracy of 10 ~ (-16), which is better than the existing atomic clock Accuracy (10 ~ (-14)) two orders of magnitude higher. The researchers first used multiple laser beams to act on atomic vapors to cool the atoms down to 2.5 × 10 -6 K, where the average velocity of the atoms was 1.2 cm per second using an “atomic trap” ) Make atoms interact in the microwave field twice, under the action of gravity, the atom is once rising and once falling relatively stable movement. Using this principle, cesium atomic clocks with extremely high accuracy can be manufactured.