Abstract
Topological effects on the confinement of a moving neutral particle with an induced electric dipole moment confined to a quantum ring and a two-dimensional quantum dot (described by a hard-wall confining potential) are investigated. It is shown in this work that the spectrum of energy depends on the geometric phase obtained by Wei et al. [H. Wei, R. Han, X. Wei, Phys. Rev. Lett. 75, 2071 (1995)] and persistent currents arise from this dependence in both the quantum ring and the quantum dot. Further, the behaviour of the analogue of the Landau system for a moving electric dipole confined to a two-dimensional quantum dot is discussed, and it is shown that persistent currents are absent in this case.
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Bakke, K., Furtado, C. Persistent currents for a moving neutral particle with no permanent electric dipole moment. Eur. Phys. J. B 87, 222 (2014). https://doi.org/10.1140/epjb/e2014-50106-5
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DOI: https://doi.org/10.1140/epjb/e2014-50106-5