Collimation and compression of atomic beams under conditions of coherent population trapping

D. V. Kosachev, B. Matisov, Y. Rozhdestvenskiĭ
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引用次数: 1

Abstract

A theoretical investigation was made of the collimation and compression of atomic beams under two-frequency cooling conditions. It was possible to reach cooled atom temperatures right down to TR = 2k2/2MkB ≈ 10−6 K, determined by the recoil energy of the atom. The dependences of the temperature on the frequency difference between the light waves were investigated, for velocities near zero, and these were found to be in qualitative agreement with those observed experimentally. An expression for the beam diameter after compression by diverging waves was derived. Estimates of these effects are given for cases of practical importance.
相干居群俘获条件下原子束的准直与压缩
对双频冷却条件下原子束的准直和压缩进行了理论研究。由原子的反冲能量决定,可以达到TR = 2k2/2MkB≈10−6 K的冷却原子温度。在速度接近于零的情况下,研究了光波之间的频率差与温度的关系,并发现这与实验观察到的结果在定性上是一致的。导出了发散波压缩后的光束直径表达式。对于具有实际重要性的案例给出了这些影响的估计。
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