Non-adiabatic Current Excitation in Quantum Rings
S. S. Gylfadottir, V. Gudmundsson, C. S. Tang, A. Manolescu
Abstract
We investigate the difference in the response of a one-dimensional semiconductor quantum ring and a finite-width ring to a strong and short-lived time-dependent perturbation in the THz regime. In both cases the persistent current is modified through a nonadiabatic change of the many-electron states of the system, but by different mechanisms in each case.
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