Publications (18)
A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
J. Yoneda, K. Takeda, T. Otsuka +10
Recent advances towards spin-based quantum computation have been primarily fuelled by elaborate isolation from noise sources, such as surrounding nuclear spins and spin-electric su…
TeV gamma-ray observations of southern BL Lacs with the CANGAROO 3.8m Imaging Telescope
M. D. Roberts, S. A. Dazeley, P. G. Edwards +32
Observational and theoretical results indicate that low-redshift BL Lacertae objects are the most likely extragalactic sources to be detectable at TeV energies. In this paper we pr…
Introducing Dynamical Triangulations to the Type IIB Superstrings
S. Oda, T. Yukawa
In order to consider non-perturbative effects of superstrings, we try to apply dynamical triangulations to the type IIB superstrings. The discretized action is constructed from the…
Magnetic field dependence of Pauli spin blockade: a window into the sources of spin relaxation in silicon quantum dots
G. Yamahata, T. Kodera, H. O. H. Churchill +3
We investigate spin relaxation in a silicon double quantum dot via leakage current through Pauli blockade as a function of interdot detuning and magnetic field. A dip in leakage cu…
Two-Dimensional Dynamical Triangulation using the Grand-canonical Ensemble
S. Oda, N. Tsuda, T. Yukawa
The string susceptibility exponents of dynamically triangulated two dimensional surfaces with sphere and torus topology were calculated using the grand-canonical Monte Carlo method…
Characterization and Suppression of Low-frequency Noise in Si/SiGe Quantum Point Contacts and Quantum Dots
K. Takeda, T. Obata, Y. Fukuoka +5
We report on the effects of a global top gate on low-frequency noise in Schottky gate-defined quantum point contacts (QPCs) and quantum dots (QDs) in a modulation-doped Si/SiGe het…