IDEAS home Printed from https://ideas.repec.org/a/nat/nature/v430y2004i6998d10.1038_nature02693.html
   My bibliography  Save this article

Single-shot read-out of an individual electron spin in a quantum dot

Author

Listed:
  • J. M. Elzerman

    (Delft University of Technology)

  • R. Hanson

    (Delft University of Technology)

  • L. H. Willems van Beveren

    (Delft University of Technology)

  • B. Witkamp

    (Delft University of Technology)

  • L. M. K. Vandersypen

    (Delft University of Technology)

  • L. P. Kouwenhoven

    (Delft University of Technology)

Abstract

Spin is a fundamental property of all elementary particles. Classically it can be viewed as a tiny magnetic moment, but a measurement of an electron spin along the direction of an external magnetic field can have only two outcomes1: parallel or anti-parallel to the field. This discreteness reflects the quantum mechanical nature of spin. Ensembles of many spins have found diverse applications ranging from magnetic resonance imaging2 to magneto-electronic devices3, while individual spins are considered as carriers for quantum information. Read-out of single spin states has been achieved using optical techniques4, and is within reach of magnetic resonance force microscopy5. However, electrical read-out of single spins6,7,8,9,10,11,12,13 has so far remained elusive. Here we demonstrate electrical single-shot measurement of the state of an individual electron spin in a semiconductor quantum dot14. We use spin-to-charge conversion of a single electron confined in the dot, and detect the single-electron charge using a quantum point contact; the spin measurement visibility is ∼65%. Furthermore, we observe very long single-spin energy relaxation times (up to ∼0.85 ms at a magnetic field of 8 T), which are encouraging for the use of electron spins as carriers of quantum information.

Suggested Citation

  • J. M. Elzerman & R. Hanson & L. H. Willems van Beveren & B. Witkamp & L. M. K. Vandersypen & L. P. Kouwenhoven, 2004. "Single-shot read-out of an individual electron spin in a quantum dot," Nature, Nature, vol. 430(6998), pages 431-435, July.
    • Handle: RePEc:nat:nature:v:430:y:2004:i:6998:d:10.1038_nature02693
    DOI: 10.1038/nature02693
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/nature02693
    File Function: Abstract
    Download Restriction: Access to the full text of the articles in this series is restricted.
    File URL: https://libkey.io/10.1038/nature02693?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. George Gillard & Edmund Clarke & Evgeny A. Chekhovich, 2022. "Harnessing many-body spin environment for long coherence storage and high-fidelity single-shot qubit readout," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. da Cunha, C.R. & Aoki, N. & Ferry, D.K. & Velasquez, A. & Zhang, Y., 2023. "An investigation of the background potential in quantum constrictions using scanning gate microscopy and a swarming algorithm," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 614(C).
    3. Nadia O. Antoniadis & Mark R. Hogg & Willy F. Stehl & Alisa Javadi & Natasha Tomm & Rüdiger Schott & Sascha R. Valentin & Andreas D. Wieck & Arne Ludwig & Richard J. Warburton, 2023. "Cavity-enhanced single-shot readout of a quantum dot spin within 3 nanoseconds," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:nature:v:430:y:2004:i:6998:d:10.1038_nature02693. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.