Interplay of Zeeman Splitting and Tunnel Coupling in Coherent Spin Qubit Shuttling
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arXiv
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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908869456822272 |
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| author | Lin, Ssu-Chih Steinacker, Paul Feng, MengKe Dash, Ajit Serrano, Santiago Lim, Wee Han Itoh, Kohei M. Hudson, Fay E. Tanttu, Tuomo Saraiva, Andre Laucht, Arne Dzurak, Andrew S. Goan, Hsi-Sheng Yang, Chih Hwan |
| author_facet | Lin, Ssu-Chih Steinacker, Paul Feng, MengKe Dash, Ajit Serrano, Santiago Lim, Wee Han Itoh, Kohei M. Hudson, Fay E. Tanttu, Tuomo Saraiva, Andre Laucht, Arne Dzurak, Andrew S. Goan, Hsi-Sheng Yang, Chih Hwan |
| contents | Spin shuttling offers a promising approach for developing scalable silicon-based quantum processors by addressing the connectivity limitations of quantum dots. In this work, we demonstrate high-fidelity bucket-brigade spin shuttling in a silicon MOS device, utilizing Pauli-spin-blockade readout. We achieve an average shuttling fidelity of \SI{99.8}{\percent}. The residual shuttling error is highly sensitive to the ratio between interdot tunnel coupling and Zeeman splitting, with tuning of these parameters enabling up to a 20-fold variation in error rate. An appropriate four-level Hamiltonian model supports our findings. These results provide valuable insights for optimizing high-performance spin-shuttling systems in future quantum architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_15554 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Interplay of Zeeman Splitting and Tunnel Coupling in Coherent Spin Qubit Shuttling Lin, Ssu-Chih Steinacker, Paul Feng, MengKe Dash, Ajit Serrano, Santiago Lim, Wee Han Itoh, Kohei M. Hudson, Fay E. Tanttu, Tuomo Saraiva, Andre Laucht, Arne Dzurak, Andrew S. Goan, Hsi-Sheng Yang, Chih Hwan Mesoscale and Nanoscale Physics Quantum Physics Spin shuttling offers a promising approach for developing scalable silicon-based quantum processors by addressing the connectivity limitations of quantum dots. In this work, we demonstrate high-fidelity bucket-brigade spin shuttling in a silicon MOS device, utilizing Pauli-spin-blockade readout. We achieve an average shuttling fidelity of \SI{99.8}{\percent}. The residual shuttling error is highly sensitive to the ratio between interdot tunnel coupling and Zeeman splitting, with tuning of these parameters enabling up to a 20-fold variation in error rate. An appropriate four-level Hamiltonian model supports our findings. These results provide valuable insights for optimizing high-performance spin-shuttling systems in future quantum architectures. |
| title | Interplay of Zeeman Splitting and Tunnel Coupling in Coherent Spin Qubit Shuttling |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2507.15554 |