188 citations · 324 across the 9 of their papers we have counts for
9 papers
Electrically tunable three-dimensional g-factor anisotropy in single InAs self-assembled quantum dots
S. Takahashi, R. S. Deacon, A. Oiwa +3
Three-dimensional anisotropy of the Lande g-factor and its electrical modulation are studied for single uncapped InAs self-assembled quantum dots (QDs). The g-factor is evaluated f…
High Field Phenomena of Qubits
J. van Tol, G. W. Morley, S. Takahashi +3
Electron and nuclear spins are very promising candidates to serve as quantum bits (qubits) for proposed quantum computers, as the spin degrees of freedom are relatively isolated fr…
Magnetic Impurity States and Ferromagnetic Interaction in Diluted Magnetic Semiconductors
M. Ichimura, K. Tanikawa, S. Takahashi +2
The electronic structure of diluted magnetic semiconductors is studied, especially focusing on the hole character. The Haldane-Anderson model is extend to a magnetic impurity, and…
Long-range ferromagnetic correlations between Anderson impurities in a semiconductor host
N. Bulut, K. Tanikawa, S. Takahashi +1
We study the two-impurity Anderson model for a semiconductor host using the quantum Monte Carlo technique. We find that the impurity spins exhibit ferromagnetic correlations with a…
Spin Injection and Nonlocal Spin Transport in Magnetic Nanostructures
S. Takahashi, S. Maekawa
We theoretically study the nonlocal spin transport in a device consisting of a nonmagnetic metal (N) and ferromagnetic injector (F1) and detector (F2) electrodes connected to N. We…
Superconducting pi qubit with three Josephson junctions
T. Yamashita, S. Takahashi, S. Maekawa
We propose a new qubit consisting of a superconducting ring with two ordinary zero junctions and one ferromagnetic pi junction. In the system, two degenerate stable states appear i…