Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits - Hofmann, Andrea C; Jirovec, Daniel; Borovkov, Maxim; Prieto Gonzalez, Ivan; Ballabio, Andrea; Frigerio, Jacopo; Chrastina, Daniel; Isella, Giovanni; Katsaros, Georgios; Majorana bound states in Ge/SiGe heterostructures; Hole spin orbit qubits in Ge quantum wells (arXiv, 2019)
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.
submitted
Keywords: preprint