Spiderweb array: A sparse spin-qubit array

Understand

One of the main bottlenecks in the pursuit of a large-scale--chip-based quantum computer is the large number of control signals needed to operate qubit systems.

• As system sizes scale up, the number of terminals required to connect to off-chip control electronics quickly becomes unmanageable.
• Here, we discuss a quantum-dot spin-qubit architecture that integrates on-chip control electronics, allowing for a significant reduction in the number of signal connections at the chip boundary.
• By arranging the qubits in a two-dimensional (2D) array with $\sim$12 $\mu$m pitch, we create space to implement locally integrated sample-and-hold circuits.