论文标题
中子非常缓慢的几何阶段
Geometric phase of very slow neutrons
论文作者
论文摘要
通过穿过均匀磁场的中子获得的几何相（GP）阐明了其空间和自旋自由度之间的微妙相互作用。在使用热中子的标准设置中，动能要比典型的Zeeman拆分大得多。这会导致旋转在磁场轴周围几乎完美的进动，而GP仅成为相应锥角的函数。在这里，我们对非常缓慢的中子的GP进行了平面波分析，为此，动物特征会崩溃。纯粹的量子力学物质波效应（例如共振，反射和隧道）与在这种低能散射状态下GP的行为相关。
The geometric phase (GP) acquired by a neutron passing through a uniform magnetic field elucidates a subtle interplay between its spatial and spin degrees of freedom. In the standard setup using thermal neutrons, the kinetic energy is much larger than the typical Zeeman split. This causes the spin to undergo nearly perfect precession around the axis of the magnetic field and the GP becomes a function only of the corresponding cone angle. Here, we perform a plane wave analysis of the GP of very slow neutrons, for which the precession feature breaks down. Purely quantum-mechanical matter wave effects, such as resonance, reflection, and tunneling, become relevant for the behavior of the GP in this low energy scattering regime.
