Hotter is easier: unexpected temperature dependence of spin qubit frequencies

B Undseth, O Pietx-Casas, E Raymenants… - Physical Review X, 2023‏ - APS
As spin-based quantum processors grow in size and complexity, maintaining high fidelities
and minimizing crosstalk will be essential for the successful implementation of quantum …

Quantum tomography of an entangled three-qubit state in silicon

K Takeda, A Noiri, T Nakajima, J Yoneda… - Nature …, 2021‏ - nature.com
Quantum entanglement is a fundamental property of coherent quantum states and an
essential resource for quantum computing. In large-scale quantum systems, the error …

Fast gate-based readout of silicon quantum dots using Josephson parametric amplification

S Schaal, I Ahmed, JA Haigh, L Hutin, B Bertrand… - Physical review …, 2020‏ - APS
Spins in silicon quantum devices are promising candidates for large-scale quantum
computing. Gate-based sensing of spin qubits offers a compact and scalable readout with …

One minute parity lifetime of a NbTiN Cooper-pair transistor

DJ Van Woerkom, A Geresdi, LP Kouwenhoven - Nature Physics, 2015‏ - nature.com
The parity modulation of the ground state of a superconducting island is a direct
consequence of the presence of the Cooper-pair condensate preferring an even number of …

Electric-field dependent -factor anisotropy in Ge-Si core-shell nanowire quantum dots

M Brauns, J Ridderbos, A Li, EPAM Bakkers… - Physical Review B, 2016‏ - APS
We present angle-dependent measurements of the effective g factor g☆ in a Ge-Si core-
shell nanowire quantum dot. g☆ is found to be maximum when the magnetic field is pointing …

Energy efficient half-flux-quantum circuit aiming at milli-kelvin stage operation

F Li, D Pham, Y Takeshita, M Higashi… - Superconductor …, 2023‏ - iopscience.iop.org
Abstract Half-flux-quantum (HFQ) circuits are based on 0–π superconducting quantum
interference devices (SQUIDs) and is one of the energy-efficient superconductor digital …

Engineering the microwave to infrared noise photon flux for superconducting quantum systems

S Danilin, J Barbosa, M Farage, Z Zhao… - EPJ Quantum …, 2022‏ - epjqt.epj.org
Electromagnetic filtering is essential for the coherent control, operation and readout of
superconducting quantum circuits at milliKelvin temperatures. The suppression of spurious …

Josephson Effect in a Few‐Hole Quantum Dot

J Ridderbos, M Brauns, J Shen, FK de Vries… - Advanced …, 2018‏ - Wiley Online Library
A Ge–Si core–shell nanowire is used to realize a Josephson field‐effect transistor with
highly transparent contacts to superconducting leads. By changing the electric field, access …

Breakdown of the X-Ray Resonant Magnetic Scattering Signal during<? format?> Intense Pulses of Extreme Ultraviolet Free-Electron-Laser Radiation

L Müller, C Gutt, B Pfau, S Schaffert, J Geilhufe… - Physical Review Letters, 2013‏ - APS
We present results of single-shot resonant magnetic scattering experiments of Co/Pt
multilayer systems using 100 fs long ultraintense pulses from an extreme ultraviolet (XUV) …

Bottom‐Up Single‐Electron Transistors

KS Makarenko, Z Liu, MP de Jong… - Advanced …, 2017‏ - Wiley Online Library
As the downscaling of conventional semiconductor electronics becomes more and more
challenging, the interest in alternative material systems and fabrication methods is growing …