Is the angular momentum of an electron conserved in a uniform magnetic field?
Is the angular momentum of an electron conserved in a uniform magnetic field?
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DOI：
10.1103/physrevlett.113.240404
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发表时间：
2014-12
影响因子：
8.6
通讯作者：
Colin R. Greenshields;R. Stamps;S. Franke-Arnold;S. Barnett
中科院分区：
文献类型：
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作者：
Colin R. Greenshields;R. Stamps;S. Franke-Arnold;S. Barnett
我们证明了在均匀磁场中运动的电子具有时变的“反磁”角动量。令人惊讶的是，这意味着电子的动量角动量可能会随时间而变化，尽管系统具有旋转对称性。这种对角动量守恒的明显破坏通过包含周围场的角动量来解决。
We show that an electron moving in a uniform magnetic field possesses a time-varying "diamagnetic" angular momentum. Surprisingly this means that the kinetic angular momentum of the electron may vary with time, despite the rotational symmetry of the system. This apparent violation of angular momentum conservation is resolved by including the angular momentum of the surrounding fields.