Motion-Induced Transition of Positronium through a Static Periodic Magnetic Field in the Sub-THz Region
Motion-Induced Transition of Positronium through a Static Periodic Magnetic Field in the Sub-THz Region
复制标题
正电子通过亚太赫兹区域静态周期磁场的运动诱发跃迁
DOI：
10.1103/physrevlett.124.173202
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发表时间：
2020
影响因子：
8.6
通讯作者：
Nagashima Y.
中科院分区：
文献类型：
--
作者：
Nagata Y.;Michishio K.;Iizuka T.;Kikutani H.;Chiari L.;Tanaka F.;Nagashima Y.
在静态周期性场中运动的原子在其自身的静止坐标系中经历与时间相关的振荡场。通过调节频率，可以引发原子跃迁。到目前为止，这种类型的转变已在 EUV 区域或更高频率下通过晶体场以及在微波区域通过人工场得到了证明。在这里，我们通过使用带有多层磁光栅的能量可调 Ps 光束来观察亚太赫兹区域的正电子素 (Ps) 跃迁。该光栅产生一个微米级的周期性场，其振幅对应于巨大的能量通量，从而产生有效的磁偶极子跃迁。
Atoms moving in a static periodic field experience a time-dependent oscillating field in their own rest frame. By tuning the frequency, an atomic transition can be induced. So far, this type of transition has been demonstrated in the EUV region or at higher frequencies by crystalline fields and in the microwave region by artificial fields. Here, we present the observation of the transition of positronium (Ps) in the sub-THz region by using an energy-tunable Ps beam with a multilayered magnetic grating. This grating produces a microsized periodic field, whose amplitude corresponds to a huge energy flux of, resulting in the efficient magnetic dipole transition.