| Autor: |
Harbusch, D., Manus, S., Tranitz, H. P., Wegscheider, W., Ludwig, S. |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. B 82, 195310 (2010) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.82.195310 |
| Popis: |
Time-resolved electron dynamics in coupled quantum dots is directly observed by a pulsed-gate technique. While individual gate voltages are modulated with periodic pulse trains, average charge occupations are measured with a nearby quantum point contact as detector. A key component of our setup is a sample holder optimized for broadband radio frequency applications. Our setup can detect displacements of single electrons on time scales well below a nanosecond. Tunneling rates through individual barriers and relaxation times are obtained by using a rate equation model. We demonstrate the full characterization of a tunable double quantum dot using this technique, which could also be used for coherent charge qubit control. |
| Databáze: |
arXiv |
| Externí odkaz: |
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