Blueprint of a scalable spin qubit shuttle device for coherent mid-range qubit transfer in disordered Si/SiGe/SiO$_2$

Understand

Silicon spin qubits stand out due to their very long coherence times, compatibility with industrial fabrication, and prospect to integrate classical control electronics.

• To achieve a truly scalable architecture, a coherent mid-range link that moves the electrons between qubit registers has been suggested to solve the signal fan-out problem.
• Here, we present a blueprint of such a $\approx 10\,\mu$m long link, called a spin qubit shuttle, which is based on connecting an array of gates into a small number of sets.
• To control these sets, only a few voltage control lines are needed and the number of these sets and thus the number of required control signals is independent of the length of this link.