We search for well configurations corresponding to three different types of interaction between the two electrons.
- In configuration I we address both qubits independently and can thereby perform single-qubit state rotations and measurements.
- Configurations II and III correspond to avoided level crossings between two (\( E_{01}, E_{10} \)) and three (\( E_{11}, E_{20}, E_{02} \)) energy levels respectively, where the electrons' motion becomes correlated, that is they are entangled.
Both anharmonicity and detuning changes with the shape of our well.
We create a voltage parameterization
$$
\begin{equation}
V(\lambda) = (1-\lambda)V_\mathrm{I} + \lambda V_\mathrm{III}
\tag{22}
\end{equation}
$$