High-fidelity single-spin shuttling in silicon
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | De Smet, Maxim Matsumoto, Yuta Zwerver, Anne-Marije J. Tryputen, Larysa de Snoo, Sander L. Amitonov, Sergey V. Katiraee-Far, S. R. Sammak, Amir Samkharadze, Nodar Gül, Önder Wasserman, Rick N. M. Greplová, E. Rimbach-Russ, Maximilian Scappucci, Giordano Vandersypen, Lieven M. K. |
| author_facet | De Smet, Maxim Matsumoto, Yuta Zwerver, Anne-Marije J. Tryputen, Larysa de Snoo, Sander L. Amitonov, Sergey V. Katiraee-Far, S. R. Sammak, Amir Samkharadze, Nodar Gül, Önder Wasserman, Rick N. M. Greplová, E. Rimbach-Russ, Maximilian Scappucci, Giordano Vandersypen, Lieven M. K. |
| contents | The computational power and fault-tolerance of future large-scale quantum processors derive in large part from the connectivity between the qubits. One approach to increase connectivity is to engineer qubit-qubit interactions at a distance. Alternatively, the connectivity can be increased by physically displacing the qubits. This has been explored in trapped-ion experiments and using neutral atoms trapped with optical tweezers. For semiconductor spin qubits, several studies have investigated spin coherent shuttling of individual electrons, but high-fidelity transport over extended distances remains to be demonstrated. Here we report shuttling of an electron inside an isotopically purified Si/SiGe heterostructure using electric gate potentials. First, we form static quantum dots, and study how spin coherence decays as we repeatedly move a single electron between up to five dots. Next, we create a traveling wave potential to transport an electron in a moving quantum dot. This second method shows substantially better spin coherence than the first. It allows us to displace an electron over an effective distance of 10 $μ$m in under 200 ns with an average fidelity of 99.5%. These results will guide future efforts to realize large-scale semiconductor quantum processors, making use of electron shuttling both within and between qubit arrays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_07267 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-fidelity single-spin shuttling in silicon De Smet, Maxim Matsumoto, Yuta Zwerver, Anne-Marije J. Tryputen, Larysa de Snoo, Sander L. Amitonov, Sergey V. Katiraee-Far, S. R. Sammak, Amir Samkharadze, Nodar Gül, Önder Wasserman, Rick N. M. Greplová, E. Rimbach-Russ, Maximilian Scappucci, Giordano Vandersypen, Lieven M. K. Mesoscale and Nanoscale Physics Quantum Physics The computational power and fault-tolerance of future large-scale quantum processors derive in large part from the connectivity between the qubits. One approach to increase connectivity is to engineer qubit-qubit interactions at a distance. Alternatively, the connectivity can be increased by physically displacing the qubits. This has been explored in trapped-ion experiments and using neutral atoms trapped with optical tweezers. For semiconductor spin qubits, several studies have investigated spin coherent shuttling of individual electrons, but high-fidelity transport over extended distances remains to be demonstrated. Here we report shuttling of an electron inside an isotopically purified Si/SiGe heterostructure using electric gate potentials. First, we form static quantum dots, and study how spin coherence decays as we repeatedly move a single electron between up to five dots. Next, we create a traveling wave potential to transport an electron in a moving quantum dot. This second method shows substantially better spin coherence than the first. It allows us to displace an electron over an effective distance of 10 $μ$m in under 200 ns with an average fidelity of 99.5%. These results will guide future efforts to realize large-scale semiconductor quantum processors, making use of electron shuttling both within and between qubit arrays. |
| title | High-fidelity single-spin shuttling in silicon |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2406.07267 |