Operating semiconductor quantum processors with hopping spins

• DOI: 10.1126/science.ado5915
• Publication Date: 2024-07-25T18:00:30Z
• Authors: Chien-An Wang; Valentin John; Hanifa Tidjani; Cécile X. Yu; Alexander S. Ivlev; Corentin Déprez; Floor van Riggele...; Benjamin D. Woods; Nico W. Hendrickx; William I. L. Lawrie; Lucas E. A. Steho...; Stefan D. Oosterhout; Amir Sammak; Mark Friesen; Giordano Scappucci; Sander L. de Snoo; Maximilian Rimbac...; Francesco Borsoi; Menno Veldhorst
• Keywords: 0301 basic medicine; 03 medical and health sciences; Condensed Matter - Mesoscale and Nanoscale Physics; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); FOS: Physical sciences

Qubits that can be efficiently controlled are essential for the development of scalable quantum hardware. Although resonant control is used to execute high-fidelity gates, scalability challenged by integration high-frequency oscillating signals, qubit cross-talk, and heating. Here, we show engineering hopping spins between dots with a site-dependent spin quantization axis, established discrete signals. We demonstrate hopping-based logic obtain single-qubit gate fidelities 99.97%, coherent shuttling 99.992% per hop, two-qubit fidelity 99.3%, corresponding error rates have been predicted allow correction. also constitute tuning method statistically mapping coherence 10-quantum dot system. Our results dense arrays sparse occupation could developed efficient high-connectivity registers.