Linear Quantum Dot Qubit Arrays With Resonator Coupling

The patent transitions from a planar two-dimensional qubit array to a three-dimensional architecture where qubits are arranged in multiple stacked layers. Control lines are routed through vertical vias between layers, allowing control signals to reach qubits in the middle of the array without requiring extensive lateral wiring. This vertical dimension resolves the wiring fanout problem by distributing control lines across multiple layers rather than congesting them in a single plane.

The patent divides the large-scale qubit array into multiple smaller stacked layers, each containing a manageable number of qubits. This segmentation allows control and readout electronics to be distributed across layers, with each layer having its own set of control lines and resonators. The vertical stacking reduces the lateral wiring requirements for each individual layer, making it feasible to control millions of qubits by managing smaller subsets in each layer independently.

The patent implements local quality by placing nanomagnets only at specific locations (every other pair of quantum dots) rather than uniformly across the entire array. This creates distinct magnetic environments at different locations, allowing qubits to be addressed selectively based on their local magnetic field conditions. The periodic placement pattern provides a systematic way to create addressable zones without requiring complex individual customization of each qubit location.