Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits

Andrea Hofmann; Daniel Jirovec; Maxim Borovkov; Ivan Prieto; Andrea Ballabio; Jacopo Frigerio; Daniel Chrastina; Giovanni Isella; Georgios Katsaros

Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits

Mesoscale and Nanoscale Physics 2019-10-15 v1

Authors: Andrea Hofmann , Daniel Jirovec , Maxim Borovkov , Ivan Prieto , Andrea Ballabio , Jacopo Frigerio , Daniel Chrastina , Giovanni Isella , Georgios Katsaros

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Abstract

We study double quantum dots in a Ge/SiGe heterostructure and test their maturity towards singlet-triplet ( $S-T_0$ ) qubits. We demonstrate a large range of tunability, from two single quantum dots to a double quantum dot. We measure Pauli spin blockade and study the anisotropy of the $g$ -factor. We use an adjacent quantum dot for sensing charge transitions in the double quantum dot at interest. In conclusion, Ge/SiGe possesses all ingredients necessary for building a singlet-triplet qubit.

Keywords

Ge/SiGe quantum dots singlet-triplet qubit double quantum dot Pauli spin blockade g-factor anisotropy charge sensing

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@article{arxiv.1910.05841,
  title  = {Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits},
  author = {Andrea Hofmann and Daniel Jirovec and Maxim Borovkov and Ivan Prieto and Andrea Ballabio and Jacopo Frigerio and Daniel Chrastina and Giovanni Isella and Georgios Katsaros},
  journal= {arXiv preprint arXiv:1910.05841},
  year   = {2019}
}

Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits

Abstract

Keywords

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