Single-shot read-out of an individual electron spin in a quantum dot
| dc.creator | Elzerman, J. M. | |
| dc.creator | Hanson, R. | |
| dc.creator | van Beveren, L. H. Willems | |
| dc.creator | Witkamp, B. | |
| dc.creator | Vandersypen, L. M. K. | |
| dc.creator | Kouwenhoven, L. P. | |
| dc.date | 2004-11-09 | |
| dc.date | 2004-11-19 | |
| dc.date.accessioned | 2026-07-07T03:01:58Z | |
| dc.date.available | 2026-07-07T03:01:58Z | |
| dc.description | 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 outcomes: 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 imaging to magneto-electronic devices, while individual spins are considered as carriers for quantum information. Read-out of single spin states has been achieved using optical techniques, and is within reach of magnetic resonance force microscopy. However, electrical read-out of single spins has so far remained elusive. Here, we demonstrate electrical single-shot measurement of the state of an individual electron spin in a semiconductor quantum dot. 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 Tesla), which are encouraging for the use of electron spins as carriers of quantum information. | |
| dc.description | 13 pages, 7 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0411232 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0411232 | |
| dc.identifier | extended version of Nature 430, 431-435 (2004) | |
| dc.identifier | doi:10.1038/nature02693 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/25235 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Single-shot read-out of an individual electron spin in a quantum dot | |
| dc.type | text |