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11 papers · 2 filters
Spin filtering due to quantum interference in periodic mesoscopic networks
Amnon Aharony, Ora Entin-Wohlman, Yasuhiro Tokura +1
We present several new results, extending our recent proposal of a spin filter based on a tight-binding model for a periodic chain of diamond-like loops [Phys. Rev. B {\bf 78}, 125…
Cooling a micro-mechanical resonator by quantum back-action from a noisy qubit
Ying-Dan Wang, Yong Li, Fei Xue +2
We study the role of qubit dephasing in cooling a mechanical resonator by quantum back-action. With a superconducting flux qubit as a specific example, we show that ground-state co…
Interplay between one-dimensional confinement and crystallographic anisotropy in ballistic hole quantum wires
O. Klochan, A. P. Micolich, L. H. Ho +3
We study the Zeeman splitting in induced ballistic 1D quantum wires aligned along the [233] and [011] axes of a high mobility (311)A undoped heterostructure. Our data shows that th…
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…
Electric-Field-Induced Nuclear Spin Resonance Mediated by Oscillating Electron Spin Domains in GaAs-Based Semiconductors
N. Kumada, T. Kamada, S. Miyashita +2
We demonstrate an alternative nuclear spin resonance using radio frequency (RF) electric field (nuclear electric resonance: NER) instead of magnetic field. The NER is based on the…
Coupling superconducting flux qubits at optimal point via dynamic decoupling with the quantum bus
Y. D. Wang, A. Kemp, K. Semba
We propose a scheme with dc-control of finite bandwidth to implement two-qubit gate for superconducting flux qubits at the optimal point. We provide a detailed non-perturbative ana…