标题： 纵向原子束自旋回波实验：研究氢中宇称不守恒的一种可能方法 显示英文标题

标题： Longitudinal Atomic Beam Spin Echo Experiments: A possible way to study Parity Violation in Hydrogen

摘要： 我们讨论氢原子在静态电场和磁场中的传播情况，在纵向原子束自旋回波（lABSE）装置中进行。 根据外部场的选择，原子可能获得动力学和几何的量子力学相位。 作为前者的例子，我们首先展示了对原子氢的束内自旋旋转测量，这些测量结果与理论非常吻合。 对氢的亚稳态2S态行为的额外计算表明，几何相位可能表现出宇称（P-）破坏的特征。 这为未来的lABSE实验提供了可能，重点研究最轻原子中的P破坏几何相位。 显示英文摘要

摘要： We discuss the propagation of hydrogen atoms in static electric and magnetic fields in a longitudinal atomic beam spin echo (lABSE) apparatus. Depending on the choice of the external fields the atoms may acquire both dynamical and geometrical quantum mechanical phases. As an example of the former, we show first in-beam spin rotation measurements on atomic hydrogen, which are in excellent agreement with theory. Additional calculations of the behaviour of the metastable 2S states of hydrogen reveal that the geometrical phases may exhibit the signature of parity-(P-)violation. This invites for possible future lABSE experiments, focusing on P-violating geometrical phases in the lightest of all atoms.