Digital-Controlled Method of Conveyor-Belt Spin Shuttling in Silicon for Large-Scale Quantum Computation

TL;DR

This paper introduces a digital-controlled conveyor-belt shuttling technique for silicon quantum processors that reduces wiring and power needs while maintaining high fidelity, facilitating scalable quantum computing.

Contribution

It presents a novel digital control method with a switch matrix and filters, improving scalability and robustness over traditional analog approaches.

Findings

Achieves high fidelity comparable to analog methods

Reduces wiring overhead and power dissipation

Demonstrates robustness against device variations

Abstract

We propose a digital-controlled conveyor-belt shuttling method for silicon-based quantum processors, addressing the scalability challenges of conventional analog sinusoidal implementations. By placing a switch matrix and low-pass filters in a cryogenic environment, our approach synthesizes near-sinusoidal waveforms from a limited number of DC voltage levels. Simulation results demonstrate that the proposed method achieves fidelity comparable to analog methods while significantly reducing wiring overhead and power dissipation. Moreover, the design offers robustness against device-level variations, enabling large-scale integration of high-fidelity spin shuttling for quantum error correction.