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Loading a quantum-dot based “Qubyte” register

Journal Article (2019)
Author(s)

Christian Volk (Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab, TU Delft - TU Delft Services, TU Delft - QuTech Advanced Research Centre)

A. M. Zwerver (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QCD/Vandersypen Lab, TU Delft - TU Delft Services)

Uditendu Mukhopadhyay (Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab, TU Delft - TU Delft Services, TU Delft - QuTech Advanced Research Centre)

Pieter T. Eendebak (TNO, TU Delft - BUS/General)

C. J. van Diepen (TU Delft - QCD/Vandersypen Lab, TU Delft - QuTech Advanced Research Centre, TU Delft - TU Delft Services, Kavli institute of nanoscience Delft)

J.P. Dehollain Lorenzana (TU Delft - QCD/Vandersypen Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)

T. Hensgens (TU Delft - QCD/Vandersypen Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)

T. Fujita (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab, Osaka University)

Lieven Vandersypen (Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab, TU Delft - QuTech Advanced Research Centre, TU Delft - QN/Vandersypen Lab)

More Authors (External organisation)

Research Group
QCD/Vandersypen Lab
Copyright
© 2019 C.A. Volk, A.M.J. Zwerver, U. Mukhopadhyay, P.T. Eendebak, C.J. van Diepen, J.P. Dehollain Lorenzana, T. Hensgens, T. Fujita, L.M.K. Vandersypen, More Authors
DOI related publication
https://doi.org/10.1038/s41534-019-0146-y
More Info
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Publication Year
2019
Language
English
Copyright
© 2019 C.A. Volk, A.M.J. Zwerver, U. Mukhopadhyay, P.T. Eendebak, C.J. van Diepen, J.P. Dehollain Lorenzana, T. Hensgens, T. Fujita, L.M.K. Vandersypen, More Authors
Research Group
QCD/Vandersypen Lab
Issue number
1
Volume number
5
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Abstract

Electrostatically defined quantum dot arrays offer a compelling platform for quantum computation and simulation. However, tuning up such arrays with existing techniques becomes impractical when going beyond a handful of quantum dots. Here, we present a method for systematically adding quantum dots to an array one dot at a time, in such a way that the number of electrons on previously formed dots is unaffected. The method allows individual control of the number of electrons on each of the dots, as well as of the interdot tunnel rates. We use this technique to tune up a linear array of eight GaAs quantum dots such that they are occupied by one electron each. This new method overcomes a critical bottleneck in scaling up quantum-dot based qubit registers.