Single-electron Spin Resonance in a Quadruple Quantum Dot
Abstract
Electron spins in semiconductor quantum dots are good candidates of quantum bits for quantum information processing. Basic operations of the qubit have been realized in recent years: initialization, manipulation of single spins, two qubit entanglement operations, and readout. Now it becomes crucial to demonstrate scalability of this architecture by conducting spin operations on a scaled up system. Here, we demonstrate single-electron spin resonance in a quadruple quantum dot. A few-electron quadruple quantum dot is formed within a magnetic field gradient created by a micro-magnet. We oscillate the wave functions of the electrons in the quantum dots by applying microwave voltages and this induces electron spin resonance. The resonance energies of the four quantum dots are slightly different because of the stray field created by the micro-magnet and therefore frequency-resolved addressable control of the electron spin resonance is possible.
Cite
@article{arxiv.1510.02547,
title = {Single-electron Spin Resonance in a Quadruple Quantum Dot},
author = {Tomohiro Otsuka and Takashi Nakajima and Matthieu R. Delbecq and Shinichi Amaha and Jun Yoneda and Kenta Takeda and Giles Allison and Takumi Ito and Retsu Sugawara and Akito Noiri and Arne Ludwig and Andreas D. Wieck and Seigo Tarucha},
journal= {arXiv preprint arXiv:1510.02547},
year = {2016}
}
Comments
11 pages, 3 figures