Physics-Informed Optimisation of Conveyor Mode Spin Qubit Transport

2025/10/08 by Andrii Sokolov, Conor Power, Sokolov, Andrii +3 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #Surface and Thin Film Phenomena

paper · pdf · doi:10.48550/arxiv.2510.06943

openalex publication_date 2025/10/08 · openalex created_date 2025/10/18 · openalex updated_date 2026/07/28

Abstract

Scalable quantum information processing in spin-based architectures necessitates the a bility to reliably shuttle quantum states across extended device regions with minimal decoherence. In this work, we present a physics-informed algorithm for optimizing electrostatic bias equences that enable conveyor-mode electron transport in silicon-based quantum dot devices. Our approach combines self-consistent Poisson and Schrodinger solvers to maintain a constant ground state energy and enable near-constant velocity shuttling, with potential applicability to both single-electron and hole transport. We validate the algorithm across three representative technologies: Fully-Depleted Silicon on Insulator (FD-SOI), Silicon Metal-Oxide-Seminconductor (SiMOS) and Silicon-Germanium Heterostracture (Si/SiGe), highlighting key limitations and material-specific effects that influence transport fidelity. Our findings underscore the impact of gate geometry, dielectric interfaces, and quantum dot size on the stability of shuttling operations, and offer pathways toward improving coherence preservation in large-scale quantum systems.

Citations

• Digital-Controlled Method of Conveyor-Belt Spin Shuttling in Silicon for Large-Scale Quantum Computation
• Omnidirectional shuttling to avoid valley excitations in Si/SiGe quantum wells
• Commercial CMOS Process for Quantum Computing: Quantum Dots and Charge Sensing in a 22 nm Fully Depleted Silicon-on-Insulator Process
• Robustness of electron charge shuttling: Architectures, pulses, charge defects and noise thresholds
• Dephasing and error dynamics affecting a singlet-triplet qubit during coherent spin shuttling
• High-fidelity single-spin shuttling in silicon
• Pipeline quantum processor architecture for silicon spin qubits

Cited by

• Quantum Reverse Mapping: Synthesizing an Optimal Spin Qubit Shuttling Bus Architecture for the Surface Code

Related

• High-fidelity single-spin shuttling in silicon
• Suppressing Si Valley Excitation and Valley-Induced Spin Dephasing for Long-Distance Shuttling
• Coherent electron transport in silicon quantum dots
• Long distance spin shuttling enabled by few-parameter velocity optimization
• Optimal operation of hole spin qubits