Abstract
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 pseudospin 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 controlled-NOT operation can be realized. We estimated the relaxation () and coherence () times and the (tunable) quality factor. This scheme implies important experimental advantages for single electron spin control.
- Received 14 October 2005
DOI:https://doi.org/10.1103/PhysRevLett.96.047202
©2006 American Physical Society