71 citations · 188 across the 4 of their papers we have counts for
4 papers
Single to quadruple quantum dots with tunable tunnel couplings
Tatsuki Takakura, Akito Noiri, Toshiaki Obata +4
We prepare a gate-defined quadruple quantum dot to study the gate-tunability of single to quadruple quantum dots with finite inter-dot tunnel couplings. The measured charging energ…
Coherent Manipulation of Individual Electron Spin in a Double Quantum Dot Integrated with a Micro-Magnet
Toshiaki Obata, Michel Pioro-Ladriere, Yasuhiro Tokura +5
We report the coherent manipulation of electron spins in a double quantum dot integrated with a micro-magnet. We performed electric dipole spin resonance experiments in the continu…
Electrical control of Kondo effect and superconducting transport in a side-gated InAs quantum dot Josephson junction
Y. Kanai, R. S. Deacon, A. Oiwa +4
We measure the non-dissipative supercurrent in a single InAs self-assembled quantum dot (QD) coupled to superconducting leads. The QD occupation is both tuned by a back-gate electr…
Microwave band on-chip coil technique for single electron spin resonance in a quantum dot
Toshiaki Obata, Michel Pioro-Ladriere, Toshihiro Kubo +3
Microwave band on-chip microcoils are developed for the application to single electron spin resonance measurement with a single quantum dot. Basic properties such as characteristic…