AuthorsS. Rahman, T. M. Stace, H. P. Langtangen, M. Kataoka and C. H. W. Barnes
TitlePulse-Induced Acoustoelectric Vibrations in Surface-Gated GaAs-Based Quantum Devices
AfilliationScientific Computing, , Scientific Computing
Project(s)Center for Biomedical Computing (SFF)
Publication TypeJournal Article
Year of Publication2007
JournalPhysical Review B: Condensed Matter and Materials Physics

We present the results of a numerical investigation which show the excitation of acoustoelectric modes of vibration in GaAs-based heterostructures due to sharp nanosecond electric-field pulses applied across surface gates. In particular, we show that the pulses applied in quantum information processing applications are capable of exciting acoustoelectric modes of vibration including surface acoustic modes which propagate for distances greater than conventional device dimensions. We show that the pulse-induced acoustoelectric vibrations are capable of inducing significant undesired perturbations to the evolution of quantum systems.

Citation KeySimula.SC.43