Quantum sensing in highly non-linear superconducting nanowires enhanced superconducting nano-circuits

Project funded by Swedish Research Council (Project grant), grant 2024-05138_VR. Participating organisations named by the source: Chalmers University of Technology. Funded amount: SEK 4,200,000, as stated by the source. Runs 2025-01-01 to 2028-12-31. Keywords: Oklassificerat, Unclassified. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-06); national funding data, not CORDIS. Abstract given by the source: The project purpose is in extension of horizons of superconducting nanoelectronics as a building block of modern circuit quantum electrodynamics. We will focus on resolution of fundamental limitations in single light quanta sensing systems as well as exploration of new quantum circuit capabilities offered by strongly nonlinear superconducting transport in highly ordered ultra-thin superconducting films of magnesium diboride (MgB2). With it critical temperature of 36K in 5nm-thick films it offers to create a light-quantum sensing system which does not require sub- liquid helium cooling whereas showing high quantum efficiency at a photon flux exceeding 109 Hz. More specifically, our goals are in: a) technological and theoretical exploration of our recent discovery of extremely fast photon detection in epitaxially-grown superconducting ultrathin-film of MgB2, engineering its properties by controlled defect implanting offered by energetic helium ion beams, aiming at reaching highly efficient single-photon sensitivity for IR photons in a wide temperature range from 4K to 20K; b) exploitation of the observed very high non-linearity in kinetic inductance in MgB2 nanowires in reaching Ginzburg-Landau limits of superconductivity in demonstrations of highly tunable high-Q resonant circuits; c) monolithic and hybrid integration of dissimilar superconducting platforms combined with technological advances in thin film growth.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-22. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project "Quantum sensing in highly non-linear superconducting nanowires enhanced superconducting nano-circuits" is funded by the Swedish Research Council with SEK 4,200,000, running from January 2025 to December 2028, involving Chalmers University of Technology. Suggested technology pillar: sensing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.