234 citations · 823 across the 22 of their papers we have counts for
22 papers
Vertically Coupled Double Quantum Dots Connected In Parallel
Shinichi Amaha, Tsuyoshi Hatano, Takashi Nakajima +1
We report charge transport measurements in a ring-shaped quadruple quantum dot system, composed of two vertically coupled double quantum dots connected in parallel. The vertical co…
Coexistence of parallel and series current paths in parallel-coupled double quantum dots in nonlinear transport regime
Tsuyoshi Hatano, Toshihiro Kubo, Shinichi Amaha +2
We investigated the electron transport properties of parallel-coupled double quantum dot (DQD) devices under magnetic fields. When a low magnetic field was applied, electron tunnel…
Thermally assisted Pauli spin blockade in double quantum dots
M. Kondo, S. Miyota, W. Izumida +2
We investigate the influence of thermal energy on the current flow and electron spin states in double quantum dots in series. The quadruplet Pauli spin blockade, which is caused by…
Coherence of a driven electron spin qubit actively decoupled from quasi-static noise
Takashi Nakajima, Akito Noiri, Kento Kawasaki +11
The coherence of electron spin qubits in semiconductor quantum dots suffers mostly from low-frequency noise. During the last decade, efforts have been devoted to mitigate such nois…
Quantum nondemolition measurement of an electron spin qubit
Takashi Nakajima, Akito Noiri, Jun Yoneda +11
Measurement of quantum systems inevitably involves disturbance in various forms. Within the limits imposed by quantum mechanics, however, one can design an "ideal" projective measu…
Difference in charge and spin dynamics in a quantum dot-lead coupled system
Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq +12
We analyze time evolution of charge and spin states in a quantum dot coupled to an electric reservoir. Utilizing high-speed single-electron detection, we focus on dynamics induced…