{ "meta": { "api_type": "NWO Projects API", "version": "1.0.2", "licence": { "name": "CC0 1.0 Universal", "url": "https://creativecommons.org/publicdomain/zero/1.0", "description": "To the extent possible under law, all copyright and related or neighbouring rights have been waived worldwide to the data made available through this API." }, "documentation": "https://doi.org/10.5281/zenodo.14918287", "release_date": "2025-08-20T00:00:00", "funder": "https://doi.org/10.13039/501100003246", "ror_id": "https://ror.org/04jsz6e67", "date": "2026-11-05T00:00:00", "count": 1, "per_page": 100, "pages": 1, "page": 1 }, "projects": [ { "project_id": "680-47-430", "title": "Universal quantum error correction with nuclear spins in diamond", "funding_scheme_id": 473, "funding_scheme": "NWO-Talentprogramma Veni 2013 N", "department": "Exacte en Natuurwetenschappen", "sub_department": "Natuurkunde", "start_date": "2014-03-01T00:00:00", "end_date": "2017-06-27T00:00:00", "reporting_year": 2013, "summary_nl": "Quantum mechanical superposition states enable a powerful new way to process information and perform computations. These quantum superpositions are, however, extremely fragile: small errors continuously accumulate to inevitably destroy the quantum state. Large-scale quantum information processing therefore appears impossible without a method to correct errors.\n\nA quantum state can be protected against errors by encoding it in an entangled state of multiple quantum bits (qubits). Ancillary qubits are then used to detect and correct errors without obtaining information about the encoded state. The uninterrupted protection of a quantum state against arbitrary single-qubit errors requires at least five encoding qubits and one ancillary qubit. These demanding requirements have so far hindered experimental implementations, and the extent to which realistic errors in a quantum state can be corrected remains an open question.\n\nI propose to experimentally protect a quantum state against arbitrary single-qubit errors. For this, I will encode the state in five nuclear spins in diamond. Errors are detected by performing quantum measurements of joint properties using a nearby electron spin as ancillary qubit. The errors are subsequently corrected by fast feedback. This ambitious research plan optimally exploits two recent advances with spins in diamond, realized by my colleagues and me, to achieve one of the most sought-after goals in quantum science and technology today. \n\nThe proposed research is an important step towards fault-tolerant implementations of complex quantum algorithms. It will provide new experimental insight into the fundamental question: can a quantum state be protected indefinitely? Additionally, for this project I will develop a new quantum toolbox that enables the experimental exploration of large entangled states and quantum measurements, as well as topological protection schemes, quantum-teleportation-based computing and one-way computing.\n\n", "summary_en": "Quantum mechanical superposition states enable a powerful new way to process information and perform computations. These quantum superpositions are, however, extremely fragile: small errors continuously accumulate to inevitably destroy the quantum state. Large-scale quantum information processing therefore appears impossible without a method to correct errors.\n\nA quantum state can be protected against errors by encoding it in an entangled state of multiple quantum bits (qubits). Ancillary qubits are then used to detect and correct errors without obtaining information about the encoded state. The uninterrupted protection of a quantum state against arbitrary single-qubit errors requires at least five encoding qubits and one ancillary qubit. These demanding requirements have so far hindered experimental implementations, and the extent to which realistic errors in a quantum state can be corrected remains an open question.\n\nI propose to experimentally protect a quantum state against arbitrary single-qubit errors. For this, I will encode the state in five nuclear spins in diamond. Errors are detected by performing quantum measurements of joint properties using a nearby electron spin as ancillary qubit. The errors are subsequently corrected by fast feedback. This ambitious research plan optimally exploits two recent advances with spins in diamond, realized by my colleagues and me, to achieve one of the most sought-after goals in quantum science and technology today. \n\nThe proposed research is an important step towards fault-tolerant implementations of complex quantum algorithms. It will provide new experimental insight into the fundamental question: can a quantum state be protected indefinitely? Additionally, for this project I will develop a new quantum toolbox that enables the experimental exploration of large entangled states and quantum measurements, as well as topological protection schemes, quantum-teleportation-based computing and one-way computing.\n\n", "project_members": [ { "role": "Project leader", "member_id": 262695, "last_name": "Taminiau", "degree_pre_nominal": "dr.", "initials": "T.H.", "first_name": "Tim", "organisation": "Technische Universiteit Delft||Faculteit Technische Natuurwetenschappen||NanoScience - Kavli Institute of Nanoscience Delft", "organisation_id": 74375, "ror": "https://ror.org/02e2c7k09", "active": false }, { "role": "Researcher", "member_id": 262695, "last_name": "Taminiau", "degree_pre_nominal": "dr.", "initials": "T.H.", "first_name": "Tim", "organisation": "Technische Universiteit Delft||Faculteit Technische Natuurwetenschappen||NanoScience - Kavli Institute of Nanoscience Delft", "organisation_id": 74375, "ror": "https://ror.org/02e2c7k09", "active": false }, { "role": "Main Applicant", "member_id": 262695, "last_name": "Taminiau", "degree_pre_nominal": "dr.", "initials": "T.H.", "first_name": "Tim", "organisation": "Technische Universiteit Delft||Faculteit Technische Natuurwetenschappen||NanoScience - Kavli Institute of Nanoscience Delft", "organisation_id": 74375, "ror": "https://ror.org/02e2c7k09", "active": true } ], "products": [ { "title": "Towards quantum networks of single spins: analysis of a quantum memory with an optical interface in diamond.", "year": 2015, "edition": "184", "start": 173, "end": 182, "type": "Wetenschappelijk artikel", "journal_title": "Faraday Discussions", "authors": [ { "last_name": "Taminiau", "initials": "TH", "role": "Auteur" } ] }, { "title": "Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres", "year": 2015, "edition": "526", "start": 682, "end": 686, "type": "Wetenschappelijk artikel", "url_open_access": "https://arxiv.org/abs/1508.05949", "journal_title": "Nature", "authors": [ { "last_name": "Taminiau", "initials": "TH", "role": "Auteur" } ] }, { "title": "Robust quantum-network memory using decoherence-protected subspaces of nuclear spins", "year": 2016, "edition": "6", "start": 2104, "end": 2104, "type": "Wetenschappelijk artikel", "url_open_access": "https://arxiv.org/abs/1603.01602", "journal_title": "Physical Review X", "authors": [ { "last_name": "Taminiau", "initials": "TH", "role": "Auteur" } ] }, { "title": "Loophole-free Bell test using electron spins in diamond: second experiment and additional analysis", "year": 2016, "edition": "6", "start": 30289, "end": 30289, "type": "Wetenschappelijk artikel", "url_open_access": "https://www.nature.com/articles/srep30289", "journal_title": "Scientific Reports", "authors": [ { "last_name": "Taminiau", "initials": "TH", "role": "Auteur" } ] }, { "title": "??Repeated quantum error correction on a continuously encoded qubit by real-time feedback", "year": 2016, "edition": "7", "start": 11526, "end": 11526, "type": "Wetenschappelijk artikel", "url_open_access": "https://www.nature.com/articles/ncomms11526", "journal_title": "Nature Communications", "authors": [ { "last_name": "Taminiau", "initials": "TH", "role": "Auteur" } ] }, { "title": "Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond", "year": 2016, "edition": "7", "start": 13111, "end": 13111, "type": "Wetenschappelijk artikel", "url_open_access": "https://www.nature.com/articles/ncomms13111", "journal_title": "Nature Communications", "authors": [ { "last_name": "Taminiau", "initials": "TH", "role": "Auteur" } ] } ] } ] }