Single-electron spin resonance in a quadruple quantum dot

Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq, Shinichi Amaha, Jun Yoneda, Kenta Takeda, Giles Allison, Takumi Ito, Retsu Sugawara, Akito Noiri, Arne Ludwig, Andreas D. Wieck, Seigo Tarucha

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

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 each electron spin resonance is possible.

Original languageEnglish
Article number31820
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 2016 Aug 23

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Single-electron spin resonance in a quadruple quantum dot'. Together they form a unique fingerprint.

Cite this