Capacitors Archives - IEEE Transactions on Quantum Engineering

Impact of Interface Properties on Direct Tunneling in Al/ALD-Al₂O₃/Al Capacitors for Josephson Junction Applications

June 4, 2026Daniel Rocha-Aguilera, Gabriela Méndez-Jerónimo, Joel Molina-ReyesEarly Access, Open AccessAluminum, Aluminum oxide, Art, Capacitors, Films, Modeling, Motion pictures, Surfaces, Tunneling, Water

Abstract: The Al/AlOx/Al system is widely used for the fabrication of Josephson junctions, which constitute the central element of superconducting qubits. The process parameters for growing ultra-thin AlOx barriers by thermal oxidation in-between physical vapor deposition (PVD) runs of Al films are well understood, but the resulting barriers present several drawbacks that limit performance such […]

Emulation of Density Matrix Dynamics With Classical Analog Circuits

March 19, 2025Anthony J. Cressman, Rahul SarpeshkarQuantum ComputingAnalog circuits, Capacitors, Emulation, Mathematical models, Noise, Noise measurement, Quantum computing, Quantum system, Vectors, Voltage

Abstract: Analog circuits have emerged as a valuable quantum emulation and simulation platform. Specifically, they have been experimentally shown to excel in emulating coherent state vector dynamics and motifs of quantum circuits, such as the quantum Fourier transform, tensor product superpositions, two-level systems such as Josephson junctions, and nuclear magnetic resonance state dynamics, all on […]

Cryogenic Floating-Gate CMOS Circuits for Quantum Control

March 23, 2021Jennifer Hasler; Neil Dick; Kushal Das; Brian Degnan; Alireza Moini; David ReillyOpen Access, Quantum InformationCapacitors, Cryogenics, Current measurement, Integrated circuits, Nonvolatile memory, Transistors, Tunneling

Voltage biases are often required to bias Qubits, and yet applying a static bias requires separate chip wires, dramatically increasing the system complexity. An ideal approach would be having a nonvolatile digital or analog memory to avoid these issues. This article shows floating-gate (FG) structures could be used to set and forget potentials and tunnel […]