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      "url": "https://creativecommons.org/publicdomain/zero/1.0",
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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",
    "ror_id": "https://ror.org/04jsz6e67",
    "date": "2026-11-04T00:00:00",
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  "projects": [
    {
      "project_id": "680-47-215",
      "title": "Solid-state electron spins for optical quantum communication",
      "funding_scheme_id": 851,
      "funding_scheme": "NWO-Talentprogramma Vidi 2005 N",
      "department": "Exacte en Natuurwetenschappen",
      "sub_department": "Natuurkunde",
      "start_date": "2006-01-01T00:00:00",
      "end_date": "2011-07-28T00:00:00",
      "reporting_year": 2005,
      "summary_nl": "One of the great challenges in quantum physics is the realization of practical quantum information technology. I propose research that aims at building a memory element for optical pulses, that can preserve the quantum state of the optical pulse. It is a new approach, that investigates whether this can be accomplished with electron spins in solid-state material. This memory element is a crucial ingredient for optical quantum communication over long distances. \n\nThe research addresses the fundamental question how quantum states can be transferred between optical pulses and electron spins in solid-state material. How this can be carried out with high fidelity is largely unexplored. The project works towards an experiment that tests whether spins at different locations can be brought in an entangled quantum state via optical communication. The research is thereby a new approach to controlled preparation of quantum entangled states in solid-state material.\n\nFrom a practical point of view, the quantum memory for optical pulses is the missing link for widespread implementation of a protocol for long distance quantum communication. It is a unique quantum protocol in the sense that it is very robust against technical imperfections. The protocol makes eavesdropping on communication fundamentally impossible. If it can be built, it will find widespread application, for example in absolute-secure internet payments.\n",
      "summary_en": "One of the great challenges in quantum physics is the realization of practical quantum information technology. I propose research that aims at building a memory element for optical pulses, that can preserve the quantum state of the optical pulse. It is a new approach, that investigates whether this can be accomplished with electron spins in solid-state material. This memory element is a crucial ingredient for optical quantum communication over long distances. \n\nThe research addresses the fundamental question how quantum states can be transferred between optical pulses and electron spins in solid-state material. How this can be carried out with high fidelity is largely unexplored. The project works towards an experiment that tests whether spins at different locations can be brought in an entangled quantum state via optical communication. The research is thereby a new approach to controlled preparation of quantum entangled states in solid-state material.\n\nFrom a practical point of view, the quantum memory for optical pulses is the missing link for widespread implementation of a protocol for long distance quantum communication. It is a unique quantum protocol in the sense that it is very robust against technical imperfections. The protocol makes eavesdropping on communication fundamentally impossible. If it can be built, it will find widespread application, for example in absolute-secure internet payments.\n",
      "project_members": [
        {
          "role": "Researcher",
          "member_id": 165628,
          "last_name": "Sladkov",
          "degree_post_nominal": "MSc",
          "initials": "M.",
          "first_name": "Maksym",
          "organisation": "Rijksuniversiteit Groningen||Faculty of Science and Engineering (FSE)||Optical Condensed Matter Physics",
          "organisation_id": 73767,
          "ror": "https://ror.org/012p63287",
          "active": false
        },
        {
          "role": "Researcher",
          "member_id": 201100,
          "last_name": "Koop",
          "degree_pre_nominal": "ir.",
          "initials": "E.J.",
          "first_name": "Erik",
          "organisation": "Rijksuniversiteit Groningen||Faculty of Science and Engineering (FSE)||Optical Condensed Matter Physics",
          "organisation_id": 73767,
          "ror": "https://ror.org/012p63287",
          "active": false
        },
        {
          "role": "Project leader",
          "member_id": 120233,
          "last_name": "Wal",
          "degree_pre_nominal": "prof. dr. ir.",
          "initials": "C.H.",
          "first_name": "Caspar",
          "prefix": "van der",
          "organisation": "Rijksuniversiteit Groningen||Faculty of Science and Engineering (FSE)||Optical Condensed Matter Physics",
          "organisation_id": 73767,
          "ror": "https://ror.org/012p63287",
          "active": false
        },
        {
          "role": "Researcher",
          "member_id": 120233,
          "last_name": "Wal",
          "degree_pre_nominal": "prof. dr. ir.",
          "initials": "C.H.",
          "first_name": "Caspar",
          "prefix": "van der",
          "organisation": "Rijksuniversiteit Groningen||Faculty of Science and Engineering (FSE)||Optical Condensed Matter Physics",
          "organisation_id": 73767,
          "ror": "https://ror.org/012p63287",
          "active": false
        },
        {
          "role": "Main Applicant",
          "member_id": 120233,
          "last_name": "Wal",
          "degree_pre_nominal": "prof. dr. ir.",
          "initials": "C.H.",
          "first_name": "Caspar",
          "prefix": "van der",
          "organisation": "Rijksuniversiteit Groningen||Faculty of Science and Engineering (FSE)||Zernike Institute for Advanced Materials",
          "organisation_id": 72814,
          "ror": "https://ror.org/012p63287",
          "active": true
        }
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        {
          "title": "Charge and spin dynamics in a two dimensional electron gas",
          "year": 2007,
          "edition": "19",
          "start": 295206,
          "type": "Wetenschappelijk artikel",
          "journal_title": "J. Phys.: Condens. Matter",
          "authors": [
            {
              "last_name": "Pugzlys",
              "initials": "A.",
              "first_name": "Adrius",
              "role": "Auteur",
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              "last_name": "Wal",
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              "last_name": "Wieck",
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            {
              "last_name": "Slachter",
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            {
              "last_name": "Reuter",
              "initials": "D.",
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            {
              "last_name": "Ivanin",
              "initials": "K.",
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            {
              "last_name": "van Loosdrecht",
              "initials": "P. H. M.",
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            {
              "last_name": "Rizo",
              "initials": "P. J.",
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        {
          "title": "The influence of device geometry on many-body effects in quantum point contacts: Signatures of the 0.7 anomaly, exchange and Kondo",
          "year": 2007,
          "edition": "20",
          "start": 433,
          "type": "Wetenschappelijk artikel",
          "journal_title": "J. Supercond. Nov. Magn.",
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              "last_name": "Wal",
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              "first_name": "Caspar",
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        {
          "title": "Spin accumulation and spin relaxation in a large open quantum dot",
          "year": 2008,
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          "journal_title": "Phys. Rev. Lett.",
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          "title": "Quantum Optical Control of Donor-Bound Electron Spins in GaAs",
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          "journal_title": "Zernike Institute PhD thesis series",
          "isbn": "978-90-367-4790-5",
          "authors": [
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              "last_name": "Sladkov",
              "initials": "M.",
              "first_name": "Maksym",
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        {
          "title": "Spin-dephasing anisotropy for electrons in a diffusive quasi-1D GaAs wire",
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          "title": "Electromagnetically induced transparency with an ensemble of donor-bound electron spins in a semiconductor",
          "year": 2010,
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        {
          "title": "Towards quantum optics and entanglement with electron spin ensembles in semiconductors",
          "year": 2009,
          "edition": "11",
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          "journal_title": "Solid State Sciences",
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              "last_name": "van der Wal",
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        {
          "title": "Optical probing of spin dynamics of two-dimensional and bulk electrons in a GaAs/AlGaAs heterojunction system",
          "year": 2010,
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          "start": 113040,
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          "url_open_access": "http://iopscience.iop.org/1367-2630/12/11/113040",
          "journal_title": "New J. Phys.",
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        {
          "title": "Compact cryogenic Kerr microscope for time-resolved studies of electron spin transport in microstructures",
          "year": 2008,
          "edition": "79",
          "start": 12390,
          "type": "Wetenschappelijk artikel",
          "journal_title": "Rev. Sci. Instr.",
          "authors": [
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              "last_name": "van der Wal",
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              "last_name": "al.",
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        {
          "title": "Suppressed spin dephasing for two-dimensional and bulk electrons in GaAs wires due to engineered cancelation of spin-orbit interaction terms",
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          "edition": "81",
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