Quantum precession of cold neutron spin using multilayer spin splitters and a phase-spin-echo interferometer
Quantum precession of cold neutron spin using multilayer spin splitters and a phase-spin-echo interferometer
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使用多层自旋分裂器和相位自旋回波干涉仪进行冷中子自旋的量子进动
DOI：
10.1103/physreva.57.4720
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发表时间：
1998
影响因子：
2.9
通讯作者：
T. Akiyoshi
中科院分区：
文献类型：
--
作者：
T. Ebisawa;S. Tasaki;T. Kawai;M. Hino;N. Achiwa;Y. Otake;H. Funahashi;Dai Yamazaki;T. Akiyoshi
我们展示了一种在空间无场区诱导中子自旋旋转的方法。多层反射镜（“自旋分裂器”）被用作光学有源元件，为极化中子的一个自旋本征态提供比另一个更长的路径长度。这在两个本征态之间产生了相对相移，量子力学将其解释为中子自旋的进动。我们表明，我们的技术的自旋进动是相当于在磁场中的拉莫尔进动，虽然我们的方法没有这样的经典模拟，并发生在较短的（例如，20纳米）的长度尺度。我们还展示了一个“相位自旋回波”干涉仪的基础上对多层自旋分裂器。
We demonstrate a method of inducing neutron spin rotation in a field-free region of space. A multilayer mirror (“spin splitter”) is used as an optically active element, providing a longer path length for one spin eigenstate of a polarized neutron than for the other. This produces a relative phase shift between the two eigenstates, which is interpreted, quantum mechanically, as precession of the neutron spin. We show that the spin precession of our technique is equivalent to Larmor precession in a magnetic field, though our method has no such classical analog and occurs on shorter (eg, 20 nm) length scales. We also demonstrate a “phase spin-echo” interferometer based on a pair of multilayer spin splitters.