Splitting matter waves using an optimized standing-wave light-pulse sequence
Splitting matter waves using an optimized standing-wave light-pulse sequence
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DOI：
10.1103/physreva.71.043602
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发表时间：
2005-04
影响因子：
2.9
通讯作者：
Saijun Wu;Ying-Ju Wang;Q. Diot;M. Prentiss
中科院分区：
文献类型：
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作者：
Saijun Wu;Ying-Ju Wang;Q. Diot;M. Prentiss
在最近的实验中（Wang等人，e-print cond-mat/0407689），观察到两个驻波方脉冲的序列可以以几乎100%的效率将静止的玻色-爱因斯坦凝聚体分裂成{+-}2（{Dirac_h}/2{pi}）k衍射级。通过截断拉曼-纳特方程的两状态模型，我们提供了一个直观的图片，解释这种双方脉冲分束器方案。我们进一步证明了优化驻波多方波脉冲序列以有效地将静止原子衍射成{+-}2n（{Dirac_h}/2{pi}）k衍射级的对称叠加（n>1）是可能的。该方法被认为是定性不同于传统的光脉冲方案在布拉格或拉曼-纳特区域，并可以扩展到更复杂的原子光学元件，产生各种定制的输出动量态从冷原子源。
In a recent experiment (Wang et al., e-print cond-mat/0407689), it was observed that a sequence of two standing-wave square pulses can split a Bose-Einstein Condensate at rest into {+-}2({Dirac_h}/2{pi})k diffraction orders with almost 100% efficiency. By truncating the Raman-Nath equations to a two-state model, we provide an intuitive picture that explains this double-square-pulse beam-splitter scheme. We further show it is possible to optimize a standing-wave multiple-square-pulse sequence to efficiently diffract an atom at rest to a symmetric superposition of {+-}2n({Dirac_h}/2{pi})k diffraction orders with n>1. The approach is considered to be qualitatively different from the traditional light-pulse schemes in the Bragg or the Raman-Nath region, and can be extended to more complex atomic optical elements that produce various tailored output momentum states from a cold atom source.