Two-qubit Gate of Combined Single Spin Rotation and Inter-dot Spin Exchange in a Double Quantum Dot
Quantum Physics
2015-05-30 v1
Abstract
A crucial requirement for quantum information processing is the realization of multiple-qubit quantum gates. Here, we demonstrate an electron spin based all-electrical two-qubit gate consisting of single spin rotations and inter-dot spin exchange in a double quantum dot. A partially entangled output state is obtained by the application of the two-qubit gate to an initial, uncorrelated state. We find that the degree of entanglement is controllable by the exchange operation time. The approach represents a key step towards the realization of universal multiple qubit gates.
Keywords
Cite
@article{arxiv.1109.3342,
title = {Two-qubit Gate of Combined Single Spin Rotation and Inter-dot Spin Exchange in a Double Quantum Dot},
author = {R. Brunner and Y. -S. Shin and T. Obata and M. Pioro-Ladrière and T. Kubo and K. Yoshida and T. Taniyama and Y. Tokura and S. Tarucha},
journal= {arXiv preprint arXiv:1109.3342},
year = {2015}
}
Comments
accepted for publication, in press Phys.Rev.Lett. 2011