Josephson Sampler Response using a Binary Search Algorithm

Published

January 19, 2024

Author(s)

BART VAN ZEGHBROECK, Logan Howe, Pete Hopkins

Abstract

This paper presents the use of a binary search algorithm to obtain the simulated response of a superconducting Josephson junction-based sampler. In the absence of noise, this simple approach is superior to mimicking the experimental approach of using an analog feedback circuit. This binary search method is first used to obtain the response of an idealized sampler, analyzing the sampler risetime to a step input and its dependence on damping. Next, it is applied to a full sampler circuit. Finally, we present the first experimental implementation of this method. A 10%-to-90% step-input response of 5.1 ps was obtained using 8 binary search iterations which yielded a current sensitivity of 1 μA.

Proceedings Title

Proceedings of the 2023 European Conference on Applied Superconductivity published in IEEE Transactions on Applied Superconductivity

Conference Dates

September 3-7, 2023

Conference Location

Bologna, IT

Conference Title

European Conference on Applied Superconductivity

Pub Type

Conferences

Download Paper

https://doi.org/10.1109/TASC.2024.3353141

Local Download

Keywords

Algorithm, Binary, Josephson, Resolution, Response, Sampler, Simulation, Superconductor, Threshold

Citation

VAN ZEGHBROECK, B. , Howe, L. and Hopkins, P. (2024), Josephson Sampler Response using a Binary Search Algorithm, Proceedings of the 2023 European Conference on Applied Superconductivity published in IEEE Transactions on Applied Superconductivity, Bologna, IT, [online], https://doi.org/10.1109/TASC.2024.3353141, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956625 (Accessed October 14, 2025)