Journal article
Quantum-dot spin-state preparation with near-unity fidelity.
- Atatüre M Institute of Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland. atature@phys.ethz.ch
- Dreiser J
- Badolato A
- Högele A
- Karrai K
- Imamoglu A
- 2006-04-08
Published in:
- Science (New York, N.Y.). - 2006
English
We have demonstrated laser cooling of a single electron spin trapped in a semiconductor quantum dot. Optical coupling of electronic spin states was achieved using resonant excitation of the charged quantum dot (trion) transitions along with the heavy-light hole mixing, which leads to weak yet finite rates for spin-flip Raman scattering. With this mechanism, the electron spin can be cooled from 4.2 to 0.020 kelvin, as confirmed by the strength of the induced Pauli blockade of the trion absorption. Within the framework of quantum information processing, this corresponds to a spin-state preparation with a fidelity exceeding 99.8%.
- Language
-
- English
- Open access status
- closed
- Identifiers
-
- DOI 10.1126/science.1126074
- PMID 16601152
- Persistent URL
- https://sonar.ch/global/documents/71643
Statistics
Document views: 20
File downloads: