{ "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": "2026-11-04T00:00:00", "count": 1, "per_page": 100, "pages": 1, "page": 1 }, "projects": [ { "project_id": "680-47-508", "title": "Realizing quantum feedback control in circuit quantum electrodynamics", "funding_scheme_id": 856, "funding_scheme": "NWO-Talentprogramma Vidi 2010 N", "department": "Exacte en Natuurwetenschappen", "sub_department": "Natuurkunde", "start_date": "2011-01-01T00:00:00", "end_date": "2016-08-25T00:00:00", "reporting_year": 2010, "summary_nl": "Measurement and feedback control [1] of quantum systems is critical to developing quantum-enhanced computation technologies for the 21st century. Realizing a fault-tolerant quantum computer that factors large numbers exponentially faster using Shor's algorithm [2], for example, hinges on quantum measurement and feedback control to correct small errors induced by decoherence and imperfect gate operations. \n\nSuperconducting circuits [3] are major contenders in the race to 'go quantum' [4]. In the decade since quantum coherence in the Cooper-pair box was demonstrated [5], significant progress has been made to increase the coherence time of quantum bits (qubits) and improving gate and measurement fidelities. To date, superconducting circuits are the only solid-state quantum-information-processing architecture to have realized the simplest two-qubit quantum algorithms [6]. But control of superconducting circuits remains open-loop. To realize the next milestone, quantum error correction [7,8], feedback schemes must now be realized. \n\nI propose to develop quantum feedback control for superconducting circuits using circuit quantum electrodynamics (QED) [9-11]. Ultimately, this research plan will culminate in the solid-state realization of simple quantum error correction codes. Two routes will be pursued: (1) measurement-based and (2) fully-coherent feedback. Approach (2) will be implementable first, owing to higher fidelity of gate operations over readouts presently in circuit QED. Approach (1), while technically more challenging, will have greater impact outside of quantum computing. In particular, the broader area of quantum feedback control is largely measurement based, with many theoretical proposals awaiting experimental realization. My team will develop quantum microwave circuits and room-temperature electronics to implement for the first time feedback schemes originally proposed for cavity QED and semiconductor mesoscopics. On the way to realizing simple quantum error correction codes [12], we investigate wavefunction collapse/uncollapse by measurement [13], observe quantum jumps and the Zeno effect [14], stabilize qubits [15], and produce entanglement by measurement and feedback [16-19].\n", "summary_en": "Measurement and feedback control [1] of quantum systems is critical to developing quantum-enhanced computation technologies for the 21st century. Realizing a fault-tolerant quantum computer that factors large numbers exponentially faster using Shor's algorithm [2], for example, hinges on quantum measurement and feedback control to correct small errors induced by decoherence and imperfect gate operations. \n\nSuperconducting circuits [3] are major contenders in the race to 'go quantum' [4]. In the decade since quantum coherence in the Cooper-pair box was demonstrated [5], significant progress has been made to increase the coherence time of quantum bits (qubits) and improving gate and measurement fidelities. To date, superconducting circuits are the only solid-state quantum-information-processing architecture to have realized the simplest two-qubit quantum algorithms [6]. But control of superconducting circuits remains open-loop. To realize the next milestone, quantum error correction [7,8], feedback schemes must now be realized. \n\nI propose to develop quantum feedback control for superconducting circuits using circuit quantum electrodynamics (QED) [9-11]. Ultimately, this research plan will culminate in the solid-state realization of simple quantum error correction codes. Two routes will be pursued: (1) measurement-based and (2) fully-coherent feedback. Approach (2) will be implementable first, owing to higher fidelity of gate operations over readouts presently in circuit QED. Approach (1), while technically more challenging, will have greater impact outside of quantum computing. In particular, the broader area of quantum feedback control is largely measurement based, with many theoretical proposals awaiting experimental realization. My team will develop quantum microwave circuits and room-temperature electronics to implement for the first time feedback schemes originally proposed for cavity QED and semiconductor mesoscopics. On the way to realizing simple quantum error correction codes [12], we investigate wavefunction collapse/uncollapse by measurement [13], observe quantum jumps and the Zeno effect [14], stabilize qubits [15], and produce entanglement by measurement and feedback [16-19].\n", "project_members": [ { "role": "Project leader", "member_id": 221753, "last_name": "DiCarlo", "degree_pre_nominal": "dr.", "initials": "L.", "first_name": "Leonardo", "organisation": "Technische Universiteit Delft||QuTech", "organisation_id": 75741, "ror": "https://ror.org/02e2c7k09", "active": false }, { "role": "Researcher", "member_id": 221753, "last_name": "DiCarlo", "degree_pre_nominal": "dr.", "initials": "L.", "first_name": "Leonardo", "organisation": "Technische Universiteit Delft||QuTech", "organisation_id": 75741, "ror": "https://ror.org/02e2c7k09", "active": false }, { "role": "Researcher", "member_id": 293025, "last_name": "Poletto", "degree_pre_nominal": "dr.", "initials": "S.", "first_name": "Stefano", "organisation": "Onbekend", "organisation_id": 5229, "ror": "-", "active": false }, { "role": "Researcher", "member_id": 293031, "last_name": "Vishal", "degree_pre_nominal": "drs.", "initials": "R.", "first_name": "Janjan", "organisation": "Onbekend", "organisation_id": 5229, "ror": "-", "active": false }, { "role": "Main Applicant", "member_id": 221753, "last_name": "DiCarlo", "degree_pre_nominal": "dr.", "initials": "L.", "first_name": "Leonardo", "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": "POSTER: Quantum measurement of highly-coherent superconducting qubits in circuit Q3D", "year": 2012, "type": "Overige Output", "authors": [ { "last_name": "Riste", "initials": "D.", "first_name": "Diego", "role": "Maker", "index_number": 1 }, { "last_name": "van Leeuwen", "initials": "J. G.", "first_name": "Josephine", "role": "Maker", "index_number": 2 }, { "last_name": "DiCarlo", "initials": "L", "first_name": "Leonardo", "role": "Maker", "index_number": 4 }, { "last_name": "Shakori", "initials": "M.", "first_name": "Masoed", "role": "Maker", "index_number": 3 } ] }, { "title": "PUBLIC PRESENTATION: Superconducting circuits that process information with quantum magic", "year": 2011, "type": "Overige Output", "authors": [ { "last_name": "DiCarlo", "initials": "L", "first_name": "Leonardo", "role": "Maker", "index_number": 1 } ] }, { "title": "Probing Dynamics of an Electron-Spin Ensemble via a Superconducting Resonator", "year": 2013, "edition": "110", "start": 67004, "type": "Wetenschappelijk artikel", "journal_title": "Physical Review Letters", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Auteur", "index_number": 10 }, { "last_name": "Ranjan", "initials": "V.", "role": "Auteur", "index_number": 1 }, { "last_name": "de Lange", "initials": "G.", "role": "Auteur", "index_number": 2 }, { "last_name": "Schutjens", "initials": "R.", "role": "Auteur", "index_number": 3 }, { "last_name": "Debelhoir", "initials": "T.", "role": "Auteur", "index_number": 4 }, { "last_name": "Groen", "initials": "J.P.", "role": "Auteur", "index_number": 5 }, { "last_name": "Szombati", "initials": "D.", "role": "Auteur", "index_number": 6 }, { "last_name": "Thoen", "initials": "D.J.", "role": "Auteur", "index_number": 7 }, { "last_name": "Klapwijk", "initials": "T.M.", "role": "Auteur", "index_number": 8 }, { "last_name": "Hanson", "initials": "R.", "role": "Auteur", "index_number": 9 } ] }, { "title": "Realization of three-qubit quantum error correction with superconducting circuits", "year": 2012, "edition": "482", "start": 382, "end": 385, "type": "Wetenschappelijk artikel", "journal_title": "Nature", "authors": [ { "last_name": "DiCarlo", "initials": "L.", "first_name": "Leonardo", "role": "Auteur", "index_number": 2 }, { "last_name": "Frunzio", "initials": "L.", "first_name": "Luigi", "role": "Auteur", "index_number": 5 }, { "last_name": "Sun", "initials": "L.", "first_name": "Luyan", "role": "Auteur", "index_number": 4 }, { "last_name": "Reed", "initials": "M. D.", "first_name": "Matthew", "role": "Auteur", "index_number": 1 }, { "last_name": "Schoelkopf", "initials": "R. J.", "first_name": "Robert", "role": "Auteur", "index_number": 7 }, { "last_name": "Nigg", "initials": "S. E.", "first_name": "Simon", "role": "Auteur", "index_number": 3 }, { "last_name": "Girvin", "initials": "S. M.", "first_name": "Steven", "role": "Auteur", "index_number": 6 } ] }, { "title": "Delft scientists steal a glance at Schrödinger's cats\nAnimated cartoon (English version) explaining 2013 results on entanglement by measurement, published in Nature.", "sub_title": "Animated cartoon (English version) explaining 2013 results on entanglement by measurement, published in Nature.", "year": 2013, "type": "Publicatie", "journal_title": "YouTube", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Maker", "index_number": 3 }, { "last_name": "Riste", "initials": "D.", "role": "Maker", "index_number": 1 }, { "last_name": "de Lange", "initials": "G.", "role": "Maker", "index_number": 2 }, { "last_name": "van Wayenburg", "initials": "B.", "role": "Maker", "index_number": 4 } ] }, { "title": "Delftse wetenschappers kijken stiekem naar Schrödingers katten\nAnimated cartoon (Dutch version) explaining 2013 results on entanglement by measurement, published in Nature.", "sub_title": "Animated cartoon (Dutch version) explaining 2013 results on entanglement by measurement, published in Nature.", "year": 2013, "type": "Publicatie", "journal_title": "YouTube", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Maker", "index_number": 3 }, { "last_name": "de Lange", "initials": "G.", "role": "Maker", "index_number": 1 }, { "last_name": "Riste", "initials": "D.", "role": "Maker", "index_number": 2 }, { "last_name": "van Wayenburg", "initials": "B.", "role": "Maker", "index_number": 4 } ] }, { "title": "Feedback Control of a Solid-State Qubit Using High-Fidelity Projective Measurement", "year": 2012, "edition": "109", "start": 240502, "type": "Wetenschappelijk artikel", "journal_title": "Physical Review Letters ", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Auteur", "index_number": 4 }, { "last_name": "Riste", "initials": "D.", "role": "Auteur", "index_number": 1 }, { "last_name": "Bultink", "initials": "C.C.", "role": "Auteur", "index_number": 2 }, { "last_name": "Lehnert", "initials": "K.W.", "role": "Auteur", "index_number": 3 } ] }, { "title": "Initialization by Measurement of a Superconducting Quantum Bit Circuit", "year": 2012, "edition": "109", "start": 50507, "type": "Wetenschappelijk artikel", "journal_title": "Physical Review Letters", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Auteur", "index_number": 5 }, { "last_name": "Riste", "initials": "D", "role": "Auteur", "index_number": 1 }, { "last_name": "van Leeuwen", "initials": "J.G. ", "role": "Auteur", "index_number": 2 }, { "last_name": "Ku", "initials": "H.S.", "role": "Auteur", "index_number": 3 }, { "last_name": "Lehnert", "initials": "K.W.", "role": "Auteur", "index_number": 4 } ] }, { "title": "Millisecond Charge-Parity Fluctuations and Induced Decoherence in a Superconducting Qubit", "year": 2013, "edition": "4", "start": 1913, "type": "Wetenschappelijk artikel", "url_open_access": "http://www.nature.com/ncomms/journal/v4/n5/full/ncomms2936.html", "journal_title": "Nature Communications", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Auteur", "index_number": 6 }, { "last_name": "Riste", "initials": "D.", "role": "Auteur", "index_number": 1 }, { "last_name": "Bultink", "initials": "C.C.", "role": "Auteur", "index_number": 2 }, { "last_name": "Tiggelman", "initials": "M.J.", "role": "Auteur", "index_number": 3 }, { "last_name": "Schouten", "initials": "R.N.", "role": "Auteur", "index_number": 4 }, { "last_name": "Lehnert", "initials": "K.W.", "role": "Auteur", "index_number": 5 } ] }, { "title": "Entanglement Genesis by Ancilla-Based Parity Measurement in 2D Circuit QED", "year": 2014, "edition": "102", "start": 70502, "type": "Wetenschappelijk artikel", "journal_title": "Physical Review Letters", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Auteur", "index_number": 6 }, { "last_name": "Saira", "initials": "O.-P.", "role": "Auteur", "index_number": 1 }, { "last_name": "Groen", "initials": "J.P.", "role": "Auteur", "index_number": 2 }, { "last_name": "Cramer", "initials": "J.", "role": "Auteur", "index_number": 3 }, { "last_name": "Meretska", "initials": "M.", "role": "Auteur", "index_number": 4 }, { "last_name": "de Lange", "initials": "G.", "role": "Auteur", "index_number": 5 } ] }, { "title": "Partial-Measurement Measurement Backaction and Nonclassical Weak Values in a Superconducting Circuit", "year": 2013, "edition": "111", "start": 90506, "type": "Wetenschappelijk artikel", "journal_title": "Physical Review Letters ", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Auteur", "index_number": 8 }, { "last_name": "Groen", "initials": "J.P.", "role": "Auteur", "index_number": 1 }, { "last_name": "Riste", "initials": "D.", "role": "Auteur", "index_number": 2 }, { "last_name": "Tornberg", "initials": "L.", "role": "Auteur", "index_number": 3 }, { "last_name": "Cramer", "initials": "J.", "role": "Auteur", "index_number": 4 }, { "last_name": "de Groot", "initials": "P.C.", "role": "Auteur", "index_number": 5 }, { "last_name": "Picot", "initials": "T.", "role": "Auteur", "index_number": 6 }, { "last_name": "Johansson", "initials": "G.", "role": "Auteur", "index_number": 7 } ] }, { "title": "Deterministic Entanglement of Superconducting Qubits by Parity Measurement and Feedback", "year": 2013, "edition": "502", "start": 350, "end": 354, "type": "Wetenschappelijk artikel", "journal_title": "Nature", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Auteur", "index_number": 9 }, { "last_name": "Riste", "initials": "D.", "role": "Auteur", "index_number": 1 }, { "last_name": "Dukalski", "initials": "M.", "role": "Auteur", "index_number": 2 }, { "last_name": "Watson", "initials": "C.A.", "role": "Auteur", "index_number": 3 }, { "last_name": "de Lange", "initials": "G.", "role": "Auteur", "index_number": 4 }, { "last_name": "Tiggelman", "initials": "M.J.", "role": "Auteur", "index_number": 5 }, { "last_name": "Blanter", "initials": "Ya.M.", "role": "Auteur", "index_number": 6 }, { "last_name": "Lehnert", "initials": "K.W.", "role": "Auteur", "index_number": 7 }, { "last_name": "Schouten", "initials": "R.N.", "role": "Auteur", "index_number": 8 } ] }, { "title": "Reversing Quantum Trajectories with Analog Feedback\nEditor's suggestion", "sub_title": "Editor's suggestion", "year": 2014, "edition": "112", "start": 80501, "type": "Wetenschappelijk artikel", "journal_title": "Physical Review Letters", "authors": [ { "last_name": "Di Carlo", "initials": "L", "first_name": "Leonardo", "role": "Auteur", "index_number": 9 }, { "last_name": "de Lange", "initials": "G.", "role": "Auteur", "index_number": 1 }, { "last_name": "Riste", "initials": "D.", "role": "Auteur", "index_number": 2 }, { "last_name": "Tiggelman", "initials": "M.J.", "role": "Auteur", "index_number": 3 }, { "last_name": "Eichler", "initials": "C.", "role": "Auteur", "index_number": 4 }, { "last_name": "Tornberg", "initials": "L.", "role": "Auteur", "index_number": 5 }, { "last_name": "Johansson", "initials": "G.", "role": "Auteur", "index_number": 6 }, { "last_name": "Wallraff", "initials": "A.", "role": "Auteur", "index_number": 7 }, { "last_name": "Schouten", "initials": "R.N.", "role": "Auteur", "index_number": 8 } ] }, { "title": "Detecting bit-flip errors in a logical qubit using stabilizer measurements", "year": 2015, "edition": "6", "start": 6983, "type": "Wetenschappelijk artikel", "url_open_access": "http://www.nature.com/ncomms/2015/150429/ncomms7983/full/ncomms7983.html", "journal_title": "Nature Communications", "authors": [ { "last_name": "Riste", "initials": "D.", "role": "Auteur", "index_number": 1 }, { "last_name": "Poletto", "initials": "S.", "role": "Auteur", "index_number": 2 }, { "last_name": "Huang", "initials": "M.Z.", "role": "Auteur", "index_number": 3 }, { "last_name": "Bruno", "initials": "A.", "role": "Auteur", "index_number": 4 }, { "last_name": "Vesterinen", "initials": "V.", "role": "Auteur", "index_number": 5 }, { "last_name": "Saira", "initials": "O.-P.", "role": "Auteur", "index_number": 6 }, { "last_name": "DiCarlo", "initials": "L.", "role": "Auteur", "index_number": 7 } ] }, { "title": "TU gluurt ongestraft naar quantumkatten\nArticle in printed version of De Volkskrant", "sub_title": "Article in printed version of De Volkskrant", "year": 2013, "type": "Overige Output", "authors": [ { "last_name": "Seijlhouwer", "initials": "M.", "role": "Maker", "index_number": 1 } ] }, { "title": "Digital Feedback Control", "year": 2016, "edition": "1", "start": 187, "end": 216, "type": "Productbijdrage", "publisher": "Springer", "authors": [ { "last_name": "Riste", "initials": "D.", "role": "Auteur" }, { "last_name": "DiCarlo", "initials": "L.", "role": "Auteur" } ] }, { "title": "Millisecond charge-parity fluctuations and induced decoherence in a superconducting transmon qubit", "year": 2013, "edition": "1913", "type": "Wetenschappelijk artikel", "url_open_access": "http://www.nature.com/ncomms/journal/v4/n5/full/ncomms2936.html", "journal_title": "Nature Communications" } ] } ] }