73 citations · 513 across the 23 of their papers we have counts for
9 papers · 1 filter
π junction transition in InAs self-assembled quantum dot coupled with SQUID
S. Kim, R. Ishiguro, M. Kamio +5
We report the transport measurements on the InAs self-assembled quantum dots (SAQDs) which have a unique structural zero-dimensionality, coupled to a superconducting quantum interf…
Quantum Time-evolution in Qubit Readout Process with a Josephson Bifurcation Amplifier
Hayato Nakano, Shiro Saito, Kouichi Semba +1
We analyzed the Josephson bifurcation amplifier (JBA) readout process of a superconducting qubit quantum mechanically. This was achieved by employing numerical analyses of the dyna…
Non-local Control of the Kondo Effect in a Double Quantum Dot-Quantum Wire Coupled System
S. Sasaki, S. Kang, K. Kitagawa +7
We have performed low-temperature transport measurements on a double quantum dot-quantum wire coupled device and demonstrated non-local control of the Kondo effect in one dot by ma…
Time evolution and decoherence of entangled states realized in coupled superconducting flux qubits
Takuya Mouri, Hayato Nakano, Hideaki Takayanagi
We study theoretically how decoherence affects superposition states composed of entangled states in inductively coupled two superconducting flux-qubits. We discover that the quantu…
Coherent control of a flux qubit by phase-shifted resonant microwave pulses
Tatsuya Kutsuzawa, Shiro Saito, Hirotaka Tanaka +3
The quantum state of a flux qubit was successfully pulse-controlled by using a resonant microwave. We observed Ramsey fringes by applying a pair of phase-shifted pi/2 microwave pul…
Photoluminescence measurements in Be-delta-doped back-gate induced quantum well
M. Yamaguchi, S. Nomura, D. Sato +3
The photoluminescence (PL) spectra of a two-dimensional electron system induced in a Be-delta-doped GaAs/AlGaAs quantum well (QW) with a back gate are measured. The electron densit…