Quantum Phenomena and Devices at Millimeter Wavelengths

Project funded by Research Council of Finland, grant 334164. Participating organisations named by the source: VTT Technical Research Centre of Finland; VTT Technical Research Centre of Finland Ltd. Funded amount: EUR 467,542, as stated by the source. Runs 2020-09-01 to 2024-08-31. Keywords: Nanotechnology. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2021-02-15); national funding data, not CORDIS. Abstract given by the source: In this project, we propose to investigate the storage and manipulation of quantum states in waveguide-based superconducting circuits that operate near 94 GHz, significantly higher than state-of-the-art few GHz superconducting circuits. At 94 GHz, the increase of hf/kB to roughly 5 K makes long-term scalability to very large systems more feasible. We develop millimeter-wave superconducting circuits based on waveguides produced by wafer-scale silicon processing. We develop new thin film processes for coating the waveguides with superconductors, with sputtered Nb or NbN. Further, for improved step coverage, the development of ALD NbN is considered. We develop high-Q cavity resonators for studying the available coherence times and loss mechanisms, especially considering how the density of so called two-level systems (TLS) changes with frequency in order to clarify their microscopic origin. Josephson parametric devices using the resonators will be designed.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Research Council of Finland. Retrieved 2026-10-28. 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 Phenomena and Devices at Millimeter Wavelengths" is funded by the Research Council of Finland with a grant of EUR 467,542, running from September 2020 to August 2024. It focuses on investigating quantum state manipulation in superconducting circuits operating near 94 GHz. Suggested technology pillar: computing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.