2009/11/06 by Rui Zhu, Zhu, Rui
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.0911.1163
12 pages, 3 figures
arxiv created 2009/11/06 · arxiv updated 2009/12/01
In the adiabatic and weak-modulation quantum pump, net electron flow is driven from one reservoir to the other by absorbing or emitting an energy quantum ℏ ω from or to the reservoirs. In our approach, high-order dependence of the scattering matrix on the time is considered. Non-sinusoidal behavior of strong pumping is revealed. The relation between the pumped current and the ac driving amplitude varies from power of 2, 1 to 1/2 when stronger modulation is exerted. Open experimental observation can be interpreted by multi-energy-quantum-related processes.