论文标题
原子拉曼散射：双几何形状中的三阶衍射
Atomic Raman scattering: Third-order diffraction in a double geometry
论文作者
论文摘要
在逆转录的方案中，原子拉曼的衍射采用了布拉格衍射的某些特性，这是由于与抗谐振动量的额外耦合所致。结果，必须在布拉格型制度中进行双重拉曼衍射。利用这种制度，双拉曼允许共鸣的高阶衍射。从理论上讲，我们研究了三阶衍射的情况，并将其与一阶以及一系列的一阶脉冲序列进行比较，从而产生与三阶脉冲相同的动量转移。实际上，三阶衍射构成了基于大动量转移的超低原子和干涉法衍射的竞争工具，因为它可以降低实验的复杂性以及与序列相比衍射过程的总持续时间。
In a retroreflective scheme atomic Raman diffraction adopts some of the properties of Bragg diffraction due to additional couplings to off-resonant momenta. As a consequence, double Raman diffraction has to be performed in a Bragg-type regime. Taking advantage of this regime, double Raman allows for resonant higher-order diffraction. We study theoretically the case of third-order diffraction and compare it to first order as well as a sequence of first-order pulses giving rise to the same momentum transfer as the third-order pulse. In fact, third-order diffraction constitutes a competitive tool for the diffraction of ultracold atoms and interferometry based on large momentum transfer since it allows to reduce the complexity of the experiment as well as the total duration of the diffraction process compared to a sequence.
