[HTML][HTML] Correlating aluminum layer deposition rates, Josephson junction microstructure, and superconducting qubits' performance

JS Oh, CJ Kopas, H Cansizoglu, JY Mutus, K Yadavalli… - Acta Materialia, 2025‏ - Elsevier
An ultra-thin aluminum oxide layer is a key component for Josephson junctions (JJ) in
superconducting quantum bits (qubits). This layer serves as a barrier layer for Cooper pairs …

A multiplexed control architecture for superconducting qubits with row-column addressing

P Zhao - arxiv preprint arxiv:2403.03717, 2024‏ - arxiv.org
In state-of-the-art superconducting quantum processors, each qubit is controlled by at least
one control line that delivers control pulses generated at room temperature to qubits …

Precision frequency tuning of tunable transmon qubits using alternating-bias assisted annealing

X Wang, J Howard, EA Sete, G Stiehl… - 2024 IEEE …, 2024‏ - ieeexplore.ieee.org
Superconducting quantum processors are one of the leading platforms for realizing scalable
fault-tolerant quantum computation (FTQC). The recent demonstration of post-fabrication …

Enhanced superconducting qubit performance through ammonium fluoride etch

CJ Kopas, DP Goronzy, T Pham… - Materials for …, 2024‏ - iopscience.iop.org
The performance of superconducting qubits is often limited by dissipation and two-level
systems (TLS) losses. The dominant sources of these losses are believed to originate from …

Integration of Through‐Sapphire Substrate Machining with Superconducting Quantum Processors

N Acharya, R Armstrong, Y Balaji… - Advanced …, 2024‏ - Wiley Online Library
A sapphire machining process integrated with intermediate‐scale quantum processors is
demonstrated. The process allows through‐substrate electrical connections, necessary for …

Fast -free entangling gates for superconducting qubits assisted by a driven resonator

Z Huang, T Kim, T Roy, Y Lu, A Romanenko, S Zhu… - Physical Review …, 2024‏ - APS
Engineering high-fidelity two-qubit gates is an indispensable step toward practical quantum
computing. For superconducting quantum platforms, one important setback is the stray …

Efficient frequency allocation for superconducting quantum processors using improved optimization techniques

Z Zhang, P Gokhale, JM Larson - Physical Review A, 2025‏ - APS
Building on previous research on frequency allocation optimization for superconducting
circuit quantum processors, this work incorporates several techniques to improve overall …

Demonstrating the potential of adaptive lms filtering on fpga-based qubit control platforms for improved qubit readout in 2d and 3d quantum processing units

H Johnson, N Bornman, T Kim… - 2024 IEEE …, 2024‏ - ieeexplore.ieee.org
Advancements in quantum computing underscore the critical need for sophisticated qubit
readout techniques to accurately discern quantum states. This abstract presents our …

Tuning of Josephson junctions--the effects of depinning physics

OW Kennedy, JH Cole, CD Shelly - arxiv preprint arxiv:2502.18304, 2025‏ - arxiv.org
Building more powerful quantum computers requires manufacturing processes with tight
tolerances. To improve the tolerances on Josephson junctions, techniques to fine tune their …

Post-fabrication frequency tuning in superconducting transmon qubits

M Toselli - 2024‏ - odr.chalmers.se
This thesis presents a study on the manipulation of the normal state resistance RN of
Al/AlOx/Al Josephson junctions using electrical DC signals. The goal is to develop a post …