Electronically Controlled Color Centers in Diamond for Quantum Applications

Project funded by Swedish Research Council (Project grant), grant 2022-04186_VR. Participating organisations named by the source: Stockholm University. Funded amount: SEK 3,400,000, as stated by the source. Runs 2023-01-01 to 2026-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Den kondenserade materiens fysik, Condensed Matter Physics. 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: In this project we will demonstrate electrical manipulation and readout of the spin state of color centers in synthetic diamond. Color centers are intentionally introduced defects in the diamond crystal that can contain foreign atoms, e.g. nitrogen, and which can exist in different spin and charge states. The goal of the project is to achieve control of the spin state using graphene field-effect transistors (GFETs) on the diamond surface, something that has never been attempted before. The spin state of diamond color centers can act as qubits for room-temperature quantum computers, but also finds other applications, e.g. in quantum cryptography, nanoscale magnetometry and thermometry, and many more.Diamond has recently emerged as a leading platform for quantum technologies and is also a promising semiconductor for next-generation electronics. Graphene, on the other hand, is a semimetal consisting of a single sheet of carbon atoms and it has many unique properties, especially electronic. Our group has, in a collaborative effort, very recently demonstrated microwave-frequency operation of GFETs on diamond substrates. By using graphene transistors fabricated on the surface of diamond with embedded color centers, we propose a unique carbon-on-carbon technology where qubits are manipulated and readout by electronic, scalable means.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. 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: A project funded by the Swedish Research Council, running from 2023 to 2026, aims to electrically manipulate and read the spin state of color centers in synthetic diamond using graphene field-effect transistors, with potential applications in quantum computing and cryptography. Suggested technology pillar: enabling. Generated by AI from the public source text; it may contain errors and the original source is authoritative.