Details
| Original language | English |
|---|---|
| Article number | 1600701 |
| Journal | Physica Status Solidi (B) Basic Research |
| Volume | 254 |
| Issue number | 3 |
| Publication status | Published - 1 Mar 2017 |
Abstract
In a closed-loop controlled single-electron transistor (SET) the optimal feedback response is investigated, leading to a maximum suppression of shot-noise. Using a coupled quantum point contact (QPC) charge detector, the tunneling process is monitored in real-time and the fluctuations are fed back periodically to the tunneling barriers of the SET. The feedback response is applied proportional to the deviation from the target number of average transferred electrons. This leads to a strong suppression and temporal saturation of the cumulants of the full counting statistics. For the optimal feedback response, the saturation value of second cumulant is found to be given by target number. Astonishingly, the feedback works robust even for target numbers much smaller than one.
Keywords
- feedback control, Full counting statistics, quantum dot, shot noise, single-electron tunneling
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physica Status Solidi (B) Basic Research, Vol. 254, No. 3, 1600701, 01.03.2017.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Optimal single-electron feedback control
AU - Wagner, Timo
AU - Bayer, Johannes C.
AU - Rugeramigabo, Eddy P.
AU - Haug, Rolf J.
N1 - Funding Information: We thank Tobias Brandes for the valuable discussions. This work was financially supported by the Deutsche Forschungsgemeinschaft (GRK 1991) and the Cluster of Excellence QUEST. Publisher Copyright: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2017/3/1
Y1 - 2017/3/1
N2 - In a closed-loop controlled single-electron transistor (SET) the optimal feedback response is investigated, leading to a maximum suppression of shot-noise. Using a coupled quantum point contact (QPC) charge detector, the tunneling process is monitored in real-time and the fluctuations are fed back periodically to the tunneling barriers of the SET. The feedback response is applied proportional to the deviation from the target number of average transferred electrons. This leads to a strong suppression and temporal saturation of the cumulants of the full counting statistics. For the optimal feedback response, the saturation value of second cumulant is found to be given by target number. Astonishingly, the feedback works robust even for target numbers much smaller than one.
AB - In a closed-loop controlled single-electron transistor (SET) the optimal feedback response is investigated, leading to a maximum suppression of shot-noise. Using a coupled quantum point contact (QPC) charge detector, the tunneling process is monitored in real-time and the fluctuations are fed back periodically to the tunneling barriers of the SET. The feedback response is applied proportional to the deviation from the target number of average transferred electrons. This leads to a strong suppression and temporal saturation of the cumulants of the full counting statistics. For the optimal feedback response, the saturation value of second cumulant is found to be given by target number. Astonishingly, the feedback works robust even for target numbers much smaller than one.
KW - feedback control
KW - Full counting statistics
KW - quantum dot
KW - shot noise
KW - single-electron tunneling
UR - http://www.scopus.com/inward/record.url?scp=85007524448&partnerID=8YFLogxK
U2 - 10.1002/pssb.201600701
DO - 10.1002/pssb.201600701
M3 - Article
AN - SCOPUS:85007524448
VL - 254
JO - Physica Status Solidi (B) Basic Research
JF - Physica Status Solidi (B) Basic Research
SN - 0370-1972
IS - 3
M1 - 1600701
ER -