Why aren't people looking at guanine-positron hole trapping for building quantum circuits? I mean they are super easy to construct and can readily trap potassium and calcium in close enough proximity to get spin coupling with electron resonance to a gold scaffold. Attach to a GeAu alloy and you might be able to tune the singlet-triplet state to omit the noise from the DNA scaffold allowing for scalable quantum dots, e.g. a quantum computer with trillions of qubits.