Report
Enhanced photocurrent readout for a quantum dot qubit by bias modulation
| العنوان: | Enhanced photocurrent readout for a quantum dot qubit by bias modulation |
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| المؤلفون: | Quilter, J. H., Coles, R. J., Ramsay, A. J., Fox, A. M., Skolnick, M. S. |
| المصدر: | Journal: Applied physics letters Volume: 102 Issue: 18 Page: 181108 year: 2013 |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Quantum Physics |
| الوصف: | We demonstrate coherent control of a quantum dot exciton using photocurrent detection with a sinusoidal reverse bias. Optical control is performed at low bias, where tunneling-limited coherence times are long. Following this step, the tunneling rates are increased to remove the long-lived hole, achieving a high photocurrent signal. For a detection efficiency of 68%, electron and hole tunneling times during optical control of 200 ps and 20 ns can be achieved, compared to 120 ps and 7 ns for the constant bias case, respectively. Comment: 11 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.4804373 |
| URL الوصول: | http://arxiv.org/abs/1305.2309 |
| رقم الانضمام: | edsarx.1305.2309 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.4804373 |
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