We consider a single electron in a 1D quantum dot with a static slanting Zeeman field. By combining the spin and orbital degrees of freedom of the electron, an effective quantum two-level (qubit) system is defined. This pseudo-spin can be coherently manipulated by the voltage applied to the gate electrodes, without the need for an external time-dependent magnetic field or spin-orbit coupling. Single qubit rotations and the C-NOT operation can be realized. We estimated relaxation (T1) and coherence (T2) times, and the (tunable) quality factor. This scheme implies important experimental advantages for single electron spin control.
@article{arxiv.cond-mat/0510411,
title = {Coherent single electron spin control in a slanting Zeeman field},
author = {Yasuhiro Tokura and Wilfred G. van der Wiel and Toshiaki Obata and Seigo Tarucha},
journal= {arXiv preprint arXiv:cond-mat/0510411},
year = {2009}
}