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12 papers · 2 filters
Kondo effects and shot noise enhancement in a laterally coupled double quantum dot
Toshihiro Kubo, Yasuhiro Tokura, Seigo Tarucha
The spin and orbital Kondo effects and the related shot noise for a laterally coupled double quantum dot are studied taking account of coherent indirect coupling via a reservoir. W…
Aharonov-Bohm Oscillations Changed by Indirect Interdot Tunneling via Electrodes in Parallel-Coupled Vertical Double Quantum Dots
T. Hatano, T. Kubo, Y. Tokura +3
Aharonov-Bohm (AB) oscillations are studied for a parallel coupled vertical double quantum dot with a common source and drain electrode. We observe AB oscillations of current via a…
Ideal Quantum non-demolishing measurement of a flux qubit at variable bias
Ying-Dan Wang, Xiaobo Zhu, Christoph Bruder
We propose a scheme to realize a quantum non-demolition (QND) measurement of a superconducting flux qubit by a Josephson bifurcation amplifier. Our scheme can implement a perfect Q…
One-by-one trap activation in silicon nanowire transistors
N. Clement, K. Nishiguchi, A. Fujiwara +1
Flicker or 1/f noise in metal-oxide-semiconductor field-effect transistors (MOSFETs) has been identified as the main source of noise at low frequency. It often originates from an e…
A Silicon Nanowire Ion-Sensitive Field-Effect-Transistor with elementary charge sensitivity
N. Clement, K. Nishiguchi, J. F. Dufreche +3
We investigate the mechanisms responsible for the low-frequency noise in liquid-gated nano-scale silicon nanowire field-effect transistors (SiNW-FETs) and show that the charge-nois…
Tunable backaction of a dc SQUID on an integrated micromechanical resonator
M. Poot, S. Etaki, I. Mahboob +4
We have measured the backaction of a dc superconducting quantum interference device (SQUID) position detector on an integrated 1 MHz flexural resonator. The frequency and quality f…