Scalable quantum computing hardware in rare-earth-ion doped crystals

Project funded by Swedish Research Council (Project grant), grant 2019-04949_VR. Participating organisations named by the source: Lund University. Funded amount: SEK 3,200,000, as stated by the source. Runs 2020-01-01 to 2023-12-31. 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 2025-12-05); national funding data, not CORDIS. Abstract given by the source: Vast resources are today put into quantum technology and quantum computing (QC). In spite of orders of magnitude smaller resources than the established trapped ion and superconducting qubit techniques, QC based on rare-earth (RE) ion doped crystals is part of the European Quantum Flagship. The reason for this is its perceived potential to have better scalability than the established techniques. This is because qubits each consisting of a single RE ion can be at nm distance and multiple qubits within a few tens of nanometer cubed can all control each other. However, the perceived scalability has never been analyzed in detail but in this project we will now accurately model gate fidelities and assess the scalability. We will do this by modifying our code for coherent light-matter interaction and light propagation in rare-earth-ion doped crystals and combine it with our preliminary code describing ion-ion interactions. Experimental implementation of the scheme requires the ability to readout the quantum state of a single RE ion, a research topic which now is receiving increased attention, especially by increasing the light-matter interaction by using high finesse cavities. In this project we instead wish to build on our previous work and access the ions using a confocal geometry. We have already built and tested the equipment necessary for these experiments. If successful this project will have significant impact on the quantum computer hardware landscape.

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 "Scalable quantum computing hardware in rare-earth-ion doped crystals" is funded by the Swedish Research Council with SEK 3,200,000 from 2020 to 2023. It involves Lund University and focuses on the scalability of quantum computing using rare-earth ion doped crystals. Suggested technology pillar: computing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.