Combining multiple rare-earth ion species into a single quantum computer

Project funded by Swedish Research Council (Project grant), grant 2021-03755_VR. Participating organisations named by the source: Lund University. Funded amount: SEK 3,600,000, as stated by the source. Runs 2022-01-01 to 2025-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Atom- och molekylfysik och optik, Atom and Molecular Physics and Optics. 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: Quantum computing (QC) is one of the great challenges of our time, with promises to transform many problems from intractable to doable, e.g. in the development of medication, materials and AI. Although the current leading approaches, superconducting qubits and trapped ions, have shown progress with a few tens of qubits, there is currently no clear path to full scalability. This project aims at showing the viability of a contender to scalable QC, using rare-earth (RE) ions. The applicant recently led the efforts of writing a roadmap to RE QC, which has clarified its strengths of high qubit density and excellent integration capabilities, while also identifying a path to scalability using combinations of different species for different roles within QC, such as qubits or readout. I propose to demonstrate four critical tasks aimed at realizing the main ideas of this roadmap:Demonstrate state selective single ion detectionDemonstrate that different RE species can perform different tasksVerify high fidelity gate operationsRealize entanglement between qubit ionsTasks 1 and 2 define the core idea, while tasks 3 and 4 demonstrate that the principles are scalable to larger systems. Each task is expected to take about 1 year. This project is crucial to reap the benefits of preparations and lab build-up accomplished by the applicant during an EU-flagship project. A successful project will solidify the RE concept as one of the primary candidates for long-term scalable QC.

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, funded by the Swedish Research Council with SEK 3,600,000, aims to explore the use of rare-earth ions in quantum computing from January 2022 to December 2025, involving Lund University. It seeks to demonstrate the potential for scalable quantum computing. Suggested technology pillar: computing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.