50 citations · 186 across the 12 of their papers we have counts for
12 papers
Gate voltage dependence of noise distribution in radio-frequency reflectometry in gallium arsenide quantum dots
Motoya Shinozaki, Yui Muto, Takahito Kitada +10
We investigate gate voltage dependence of electrical readout noise in high-speed rf reflectometry using gallium arsenide quantum dots. The fast Fourier transform spectrum from the…
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…
Four single-spin Rabi oscillations in a quadruple quantum dot
Takumi Ito, Tomohiro Otsuka, Takashi Nakajima +9
Scaling up qubits is a necessary step to realize useful systems of quantum computation. Here we demonstrate coherent manipulations of four individual electron spins using a micro-m…
Tunneling induced spin dynamics in a quantum dot-lead hybrid system
Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq +11
Semiconductor quantum dots (QDs) offer a platform to explore the physics of quantum electronics including spins. Electron spins in QDs are considered good candidates for quantum bi…
Detection and control of charge states in a quintuple quantum dot
Takumi Ito, Tomohiro Otsuka, Shinichi Amaha +8
A semiconductor quintuple quantum dot with two charge sensors and an additional contact to the center dot from an electron reservoir is fabricated to demonstrate the concept of sca…
Single-electron Spin Resonance in a Quadruple Quantum Dot
Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq +10
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 year…