Details
| Original language | English |
|---|---|
| Article number | 1800393 |
| Number of pages | 10 |
| Journal | Annalen der Physik |
| Volume | 531 |
| Issue number | 6 |
| Publication status | Published - 14 Jun 2019 |
Abstract
A high level of tunability and control over arrays of quantum dots are key ingredients toward the goal of scalable-based qubit architectures. Increasing array size simultaneously increases the parameter space and therefore the tuning complexity. The electron reconfiguration behavior of quantum dot arrays isolated from the electron reservoirs is studied experimentally. Isolating a quantum dot array from the reservoirs does not only enable a high degree of control over the tunnel couplings but at the same time drastically simplifies the stability diagrams for small numbers of electrons trapped in the array. Experimental results on double, triple, and quadruple quantum dot arrays are presented and complementary model calculations allow the identification of all transitions observed in the experiment. Highly tunable long-range transitions are observed in isolated triple quantum dots and evidence of higher-order cotunneling is found for the quadruple quantum dot array.
Keywords
- charge detector, charge reconfiguration, isolated, quadruple quantum dot, quantum dots, single electron, tunnel coupling
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Annalen der Physik, Vol. 531, No. 6, 1800393, 14.06.2019.
Research output: Contribution to journal › Article › Research
}
TY - JOUR
T1 - Charge Reconfiguration in Isolated Quantum Dot Arrays
AU - Bayer, Johannes C.
AU - Wagner, Timo
AU - Rugeramigabo, Eddy P.
AU - Haug, Rolf J.
N1 - Funding information: J.C.B. acknowledges financial support from the School for Contacts in Nanosystems and the Hannover School for Nanotechnology. The authors thank the ”Fundamentals of Physics and Metrology Initiative” of Lower Saxony and they also thank G. Platero for fruitful discussions.
PY - 2019/6/14
Y1 - 2019/6/14
N2 - A high level of tunability and control over arrays of quantum dots are key ingredients toward the goal of scalable-based qubit architectures. Increasing array size simultaneously increases the parameter space and therefore the tuning complexity. The electron reconfiguration behavior of quantum dot arrays isolated from the electron reservoirs is studied experimentally. Isolating a quantum dot array from the reservoirs does not only enable a high degree of control over the tunnel couplings but at the same time drastically simplifies the stability diagrams for small numbers of electrons trapped in the array. Experimental results on double, triple, and quadruple quantum dot arrays are presented and complementary model calculations allow the identification of all transitions observed in the experiment. Highly tunable long-range transitions are observed in isolated triple quantum dots and evidence of higher-order cotunneling is found for the quadruple quantum dot array.
AB - A high level of tunability and control over arrays of quantum dots are key ingredients toward the goal of scalable-based qubit architectures. Increasing array size simultaneously increases the parameter space and therefore the tuning complexity. The electron reconfiguration behavior of quantum dot arrays isolated from the electron reservoirs is studied experimentally. Isolating a quantum dot array from the reservoirs does not only enable a high degree of control over the tunnel couplings but at the same time drastically simplifies the stability diagrams for small numbers of electrons trapped in the array. Experimental results on double, triple, and quadruple quantum dot arrays are presented and complementary model calculations allow the identification of all transitions observed in the experiment. Highly tunable long-range transitions are observed in isolated triple quantum dots and evidence of higher-order cotunneling is found for the quadruple quantum dot array.
KW - charge detector
KW - charge reconfiguration
KW - isolated
KW - quadruple quantum dot
KW - quantum dots
KW - single electron
KW - tunnel coupling
UR - http://www.scopus.com/inward/record.url?scp=85062789323&partnerID=8YFLogxK
U2 - 10.1002/andp.201800393
DO - 10.1002/andp.201800393
M3 - Article
AN - SCOPUS:85062789323
VL - 531
JO - Annalen der Physik
JF - Annalen der Physik
SN - 0003-3804
IS - 6
M1 - 1800393
ER -