Trembling motion of relativistic electrons in a magnetic field

Details Trembling motion of relativistic electrons in a magnetic field Trembling motion of relativistic electrons in a magnetic field

2010-03-29

arxiv.org/abs/1003.5504v2

Physics

Quantum Physics

4 pages, 2 figures. This work is not published. Longer version of this paper (19 pages) => see arXiv:1008.1428

Scientific paper

Zitterbewegung (ZB, the trembling motion) of free relativistic electrons in a vacuum in the presence of an external magnetic field is calculated. It is shown that the motion of an electron wave packet has intraband frequency components, corresponding to the classical cyclotron motion, and several interband frequency components corresponding to the Zitterbewegung. For a two-dimensional situation, the presence of a magnetic field makes the ZB motion stationary, i.e. not decaying in time. We show how to simulate the ZB in a magnetic field using trapped ions and laser excitations in the spirit of recently observed proof-of-principle ZB simulation by Gerritsma {\it et al.} Nature {\bf 463}, 68 (2010). It is demonstrated that, for the parameters of the Dirac equation simulated by the above experiment, the effect of a magnetic field on the Zitterbewegung is considerable.

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