Single Electron Transistors (SETs) are nanoscale electrometers of unprecedented sensitivity, and as such have been proposed as read-out devices in a number of quantum computer architectures. We show that the functionality of a standard SET can be multiplexed so as to operate as both read-out device and control gate for a solid-state qubit. Multiplexing in this way may be critical in lowering overall gate densities in scalable quantum computer architectures.
@article{arxiv.cond-mat/0608652,
title = {A multiplexed single electron transistor for application in scalable solid-state quantum computing},
author = {Vincent I. Conrad and Andrew D. Greentree and Lloyd C. L. Hollenberg},
journal= {arXiv preprint arXiv:cond-mat/0608652},
year = {2007}
}