2004/02/24 by Sigridur Sif Gylfadottir, Sigríður Sif Gylfadóttir, Marian Nita +4
Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #stochastic dynamics and bifurcation
paper · pdf · doi:10.1016/j.physe.2004.12.002
published as Physica E27, 278 (2005) · LaTeX 4 pages with 6 embedded postscript figures
arxiv created 2004/02/24 · openalex publication_date 2005/02/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study a non-adiabatic excitation of an electron system in a 1D quantum ring radiated by a short THz pulse. The response of two models, a continuous and discrete, is explored. By introducing a spatial asymmetry in the external perturbation a net current can be generated in the ring at a zero magnetic field. Effect of impurities and ratchets are investigated in combination with symmetric and asymmetric external excitation.