# High-fidelity single-spin shuttling in silicon

**Authors:** Maxim De Smet, Yuta Matsumoto, Anne-Marije J. Zwerver, Larysa Tryputen, Sander L. de Snoo, Sergey V. Amitonov, Amir Sammak, Nodar Samkharadze, Önder Gül, Rick N. M. Wasserman, Maximilian Rimbach-Russ, Giordano Scappucci, Lieven M. K. Vandersypen  
**arXiv:** [2406.07267](https://arxiv.org/abs/2406.07267)  
**Date:** 2024-06-11  
**Summary page:** https://www.summarizepaper.com/en/paper/2406.07267v1/

## Key points

- Study titled "High-fidelity single-spin shuttling in silicon" advances quantum computing by transporting electron within Si/SiGe heterostructure using electric gate potentials
- Connectivity between qubits crucial for computational power and fault-tolerance of large-scale quantum processors
- Methods to enhance connectivity include engineering qubit-qubit interactions or physically displacing the qubits
- Study involved creating static quantum dots and investigating spin coherence decay when moving a single electron between up to five dots
- Traveling wave potential developed for transporting electron in moving quantum dot showed better spin coherence compared to static dots
- Advancement allows displacement of electron over 10 μm in under 200 ns with average fidelity of 99%
- Results guide future efforts towards large-scale semiconductor quantum processors utilizing electron shuttling within and between qubit arrays
- Viability demonstrated for high-fidelity quantum interconnects between local and distant spin qubits, providing direction for further research and development

## Summary

A recent study titled "High-fidelity single-spin shuttling in silicon" has made significant progress in the field of quantum computing by successfully transporting an electron within an isotopically purified Si/SiGe heterostructure using electric gate potentials. The connectivity between qubits is crucial for the computational power and fault-tolerance of future large-scale quantum processors. One way to enhance this connectivity is through engineering qubit-qubit interactions or physically displacing the qubits. This study involved creating static quantum dots and investigating spin coherence decay when moving a single electron between up to five dots. Additionally, a traveling wave potential was developed to transport an electron in a moving quantum dot, which showed significantly better spin coherence compared to the first method. This advancement allowed for the displacement of an electron over an effective distance of 10 μm in under 200 ns with an average fidelity of 99%. These results are crucial for guiding future efforts towards realizing large-scale semiconductor quantum processors that utilize electron shuttling within and between qubit arrays. The study demonstrates the viability of high-fidelity quantum interconnects between both local and distant spin qubits, providing valuable direction for further research and development in the field of quantum computing.