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    "documentation": "https://doi.org/10.5281/zenodo.14918287",
    "release_date": "2025-08-20T00:00:00",
    "funder": "https://doi.org/10.13039/501100003246",
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    "date": "2026-11-05T00:00:00",
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    {
      "project_id": "680-47-224",
      "title": "Quantum information processing in diamond at room temperature",
      "funding_scheme_id": 853,
      "funding_scheme": "NWO-Talentprogramma Vidi 2007 N",
      "department": "Exacte en Natuurwetenschappen",
      "sub_department": "Natuurkunde",
      "start_date": "2007-11-01T00:00:00",
      "end_date": "2013-06-19T00:00:00",
      "reporting_year": 2007,
      "summary_nl": "Diamond has recently emerged as a material system with unique properties for quantum information processing. In particular, the quantum states of single electron spins can be controlled with high fidelity even at room temperature. Here, I propose to exploit the unique properties of diamond for a study of quantum entanglement between single electron and nuclear spins and for coupling single electron spins to single photons. I will use the acquired control to demonstrate the elementary functions of a room-temperature quantum computer.\nThese ambitious experiments are now within reach due to exciting progress in the past years on Nitrogen-Vacancy (N-V) centers in diamond. This N-V center has a paramagnetic electron spin that can be optically initialized and read out. Quantum superposition states of this spin can now be created and controlled with a degree of quantum coherence that is unmatched in the solid state. Furthermore, the possibility of electrically tuning the optical transition of the N-V center opens the door to integration of spins with optical cavities. Finally, N-V centers and other spins can now be positioned in pure diamond through implanting, thus allowing design and creation of any desired spin environment.\nThese results set the stage for room-temperature studies of quantum entanglement and decoherence in tailored environments, which can lead to new and unexpected insights into quantum mechanics and solid-state physics. Moreover, the tunable optical transition of N-V centers provides a natural pathway for coupling distant spins (stationary qubits) via photons (flying qubits), enabling teleportation of quantum information. The anticipated level of coherent control may lead to quantum information applications such as a quantum repeater and a room-temperature quantum processor.\n",
      "summary_en": "Diamond has recently emerged as a material system with unique properties for quantum information processing. In particular, the quantum states of single electron spins can be controlled with high fidelity even at room temperature. Here, I propose to exploit the unique properties of diamond for a study of quantum entanglement between single electron and nuclear spins and for coupling single electron spins to single photons. I will use the acquired control to demonstrate the elementary functions of a room-temperature quantum computer.\nThese ambitious experiments are now within reach due to exciting progress in the past years on Nitrogen-Vacancy (N-V) centers in diamond. This N-V center has a paramagnetic electron spin that can be optically initialized and read out. Quantum superposition states of this spin can now be created and controlled with a degree of quantum coherence that is unmatched in the solid state. Furthermore, the possibility of electrically tuning the optical transition of the N-V center opens the door to integration of spins with optical cavities. Finally, N-V centers and other spins can now be positioned in pure diamond through implanting, thus allowing design and creation of any desired spin environment.\nThese results set the stage for room-temperature studies of quantum entanglement and decoherence in tailored environments, which can lead to new and unexpected insights into quantum mechanics and solid-state physics. Moreover, the tunable optical transition of N-V centers provides a natural pathway for coupling distant spins (stationary qubits) via photons (flying qubits), enabling teleportation of quantum information. The anticipated level of coherent control may lead to quantum information applications such as a quantum repeater and a room-temperature quantum processor.\n",
      "project_members": [
        {
          "role": "Researcher",
          "member_id": 227804,
          "last_name": "Riste",
          "degree_post_nominal": "MSc",
          "initials": "D.",
          "first_name": "Diego",
          "organisation": "Technische Universiteit Delft||QuTech",
          "organisation_id": 75741,
          "ror": "https://ror.org/02e2c7k09",
          "active": false
        },
        {
          "role": "Researcher",
          "member_id": 207217,
          "last_name": "Robledo Esparza",
          "degree_pre_nominal": "dr.",
          "initials": "L.M.",
          "first_name": "Lucio",
          "organisation": "Technische Universiteit Delft||QuTech",
          "organisation_id": 75741,
          "ror": "https://ror.org/02e2c7k09",
          "active": false
        },
        {
          "role": "Researcher",
          "member_id": 207226,
          "last_name": "Lange",
          "degree_pre_nominal": "ir.",
          "initials": "G.",
          "first_name": "Gijs",
          "prefix": "de",
          "organisation": "Technische Universiteit Delft||Faculteit Technische Natuurwetenschappen||NanoScience - Kavli Institute of Nanoscience Delft||Moleculaire Biofysica",
          "organisation_id": 80491,
          "ror": "https://ror.org/02e2c7k09",
          "active": false
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          "member_id": 189671,
          "last_name": "Heeres",
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          "initials": "E.C.",
          "organisation": "Universiteit Leiden||Faculteit der Wiskunde en Natuurwetenschappen||MoNOS, Huygens Laboratorium",
          "organisation_id": 79645,
          "ror": "https://ror.org/027bh9e22",
          "active": false
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        {
          "role": "Project leader",
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          "last_name": "Hanson",
          "degree_pre_nominal": "prof. dr. ir.",
          "initials": "R.",
          "first_name": "Ronald",
          "organisation": "Technische Universiteit Delft||QuTech",
          "organisation_id": 75741,
          "ror": "https://ror.org/02e2c7k09",
          "active": false
        },
        {
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          "member_id": 169284,
          "last_name": "Hanson",
          "degree_pre_nominal": "prof. dr. ir.",
          "initials": "R.",
          "first_name": "Ronald",
          "organisation": "Technische Universiteit Delft||Faculteit Technische Natuurwetenschappen||Subfaculteit Technische Natuurkunde",
          "organisation_id": 78231,
          "ror": "https://ror.org/02e2c7k09",
          "active": true
        }
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          "year": 2010,
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            {
              "last_name": "Lange",
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          "title": "Control and coherence of the optical transition of single defect centers in diamond. Physical review letters, 105(17)",
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              "last_name": "Robledo",
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          "title": "Bootstrap tomography of high-precision pulses for quantum control. Physical review letters, 105(7)",
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          "title": "Controlling the quantum dynamics of a mesoscopic spin bath in diamond",
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