Universal control of four singlet-triplet qubits

Universal control of four singlet-triplet qubits | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Universal control of four singlet-triplet qubits Lieven Vandersypen, Xin Zhang, Elizaveta Morozova, Maximilian Rimbach-Russ, and 8 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3820596/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 31 Oct, 2024 Read the published version in Nature Nanotechnology → Version 1 posted You are reading this latest preprint version Abstract The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing as well as for studying quantum magnetism from the bottom up. On paper, individual spin-spin couplings can be independently controlled through gate voltages, but nonlinearities and crosstalk introduce significant complexity that has slowed down progress in past years. Here, we present a 2×4 germanium quantum dot array with full and controllable interactions between nearest-neighbor spins. As a demonstration of the level of control, we define four singlet-triplet qubits in this system and show two-axis single-qubit control of each qubit and SWAP-style two-qubit gates between all neighbouring qubit pairs. Combining these operations, we experimentally implement a circuit designed to generate and distribute entanglement across the array. These results highlight the potential of singlet-triplet qubits as a competing platform for quantum computing and indicate that scaling up the control of quantum dot spins in extended bilinear arrays can be feasible. Physical sciences/Nanoscience and technology/Nanoscale devices/Quantum information Physical sciences/Nanoscience and technology/Nanoscale devices/Electronic devices Full Text Additional Declarations There is NO Competing Interest. Supplementary Files UniversalSTsupple.pdf Cite Share Download PDF Status: Published Journal Publication published 31 Oct, 2024 Read the published version in Nature Nanotechnology → Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-3820596","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":267160681,"identity":"8fbc0837-3530-49ad-b335-b43d7456210a","order_by":0,"name":"Lieven Vandersypen","email":"data:image/png;base64,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","orcid":"https://orcid.org/0000-0003-4346-7877","institution":"QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands","correspondingAuthor":true,"prefix":"","firstName":"Lieven","middleName":"","lastName":"Vandersypen","suffix":""},{"id":267160682,"identity":"2e2e1a5c-4d1d-4852-9593-c122b5f70afa","order_by":1,"name":"Xin Zhang","email":"","orcid":"https://orcid.org/0000-0003-3780-4769","institution":"QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands","correspondingAuthor":false,"prefix":"","firstName":"Xin","middleName":"","lastName":"Zhang","suffix":""},{"id":267160683,"identity":"d86d9ae0-48d1-48ea-a61c-03936c19639a","order_by":2,"name":"Elizaveta Morozova","email":"","orcid":"","institution":"QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands","correspondingAuthor":false,"prefix":"","firstName":"Elizaveta","middleName":"","lastName":"Morozova","suffix":""},{"id":267160684,"identity":"03b11bda-725d-4a7c-91cd-0b9c0b188fc4","order_by":3,"name":"Maximilian Rimbach-Russ","email":"","orcid":"https://orcid.org/0000-0001-9775-0323","institution":"QuTech and Kavli Institute of Nanoscience, Delft University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Maximilian","middleName":"","lastName":"Rimbach-Russ","suffix":""},{"id":267160685,"identity":"762237c5-ccef-43ef-88e6-1caf47ea315a","order_by":4,"name":"Daniel Jirovec","email":"","orcid":"","institution":"QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands","correspondingAuthor":false,"prefix":"","firstName":"Daniel","middleName":"","lastName":"Jirovec","suffix":""},{"id":267160686,"identity":"9d693bdd-e924-436f-b953-6f74e87aa41f","order_by":5,"name":"Tzu-Kan Hsiao","email":"","orcid":"","institution":"QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands","correspondingAuthor":false,"prefix":"","firstName":"Tzu-Kan","middleName":"","lastName":"Hsiao","suffix":""},{"id":267160687,"identity":"3d5e7398-1d32-48fe-9aa0-ae0af7a877e9","order_by":6,"name":"Pablo Cova Fari$\\tilde{\\text{n}}$a","email":"","orcid":"","institution":"QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands","correspondingAuthor":false,"prefix":"","firstName":"Pablo","middleName":"Cova","lastName":"Fari$\\tilde{\\text{n}}$a","suffix":""},{"id":267160688,"identity":"f00d04dd-190c-4409-85db-c06f22a99054","order_by":7,"name":"Chien-An Wang","email":"","orcid":"https://orcid.org/0000-0002-3900-0345","institution":"QuTech and Kavli Institute of Nanoscience, Delft University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Chien-An","middleName":"","lastName":"Wang","suffix":""},{"id":267160689,"identity":"c67c41cf-a52e-4cae-8abf-441661bb4114","order_by":8,"name":"Stefan D. 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