Spin-EPR-pair separation by conveyor-mode single electron shuttling in Si/SiGe
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arXiv
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| Format: | Preprint |
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2023
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| author | Struck, Tom Volmer, Mats Visser, Lino Offermann, Tobias Xue, Ran Tu, Jhih-Sian Trellenkamp, Stefan Cywiński, Łukasz Bluhm, Hendrik Schreiber, Lars R. |
| author_facet | Struck, Tom Volmer, Mats Visser, Lino Offermann, Tobias Xue, Ran Tu, Jhih-Sian Trellenkamp, Stefan Cywiński, Łukasz Bluhm, Hendrik Schreiber, Lars R. |
| contents | Long-ranged coherent qubit coupling is a missing function block for scaling up spin qubit based quantum computing solutions. Spin-coherent conveyor-mode electron-shuttling could enable spin quantum-chips with scalable and sparse qubit-architecture. Its key feature is the operation by only few easily tuneable input terminals and compatibility with industrial gate-fabrication. Single electron shuttling in conveyor-mode in a 420 nm long quantum bus has been demonstrated previously. Here we investigate the spin coherence during conveyor-mode shuttling by separation and rejoining an Einstein-Podolsky-Rosen (EPR) spin-pair. Compared to previous work we boost the shuttle velocity by a factor of 10000. We observe a rising spin-qubit dephasing time with the longer shuttle distances due to motional narrowing and estimate the spin-shuttle infidelity due to dephasing to be 0.7 % for a total shuttle distance of nominal 560 nm. Shuttling several loops up to an accumulated distance of 3.36 $μ$m, spin-entanglement of the EPR pair is still detectable, giving good perspective for our approach of a shuttle-based scalable quantum computing architecture in silicon. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_04897 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Spin-EPR-pair separation by conveyor-mode single electron shuttling in Si/SiGe Struck, Tom Volmer, Mats Visser, Lino Offermann, Tobias Xue, Ran Tu, Jhih-Sian Trellenkamp, Stefan Cywiński, Łukasz Bluhm, Hendrik Schreiber, Lars R. Quantum Physics Mesoscale and Nanoscale Physics Long-ranged coherent qubit coupling is a missing function block for scaling up spin qubit based quantum computing solutions. Spin-coherent conveyor-mode electron-shuttling could enable spin quantum-chips with scalable and sparse qubit-architecture. Its key feature is the operation by only few easily tuneable input terminals and compatibility with industrial gate-fabrication. Single electron shuttling in conveyor-mode in a 420 nm long quantum bus has been demonstrated previously. Here we investigate the spin coherence during conveyor-mode shuttling by separation and rejoining an Einstein-Podolsky-Rosen (EPR) spin-pair. Compared to previous work we boost the shuttle velocity by a factor of 10000. We observe a rising spin-qubit dephasing time with the longer shuttle distances due to motional narrowing and estimate the spin-shuttle infidelity due to dephasing to be 0.7 % for a total shuttle distance of nominal 560 nm. Shuttling several loops up to an accumulated distance of 3.36 $μ$m, spin-entanglement of the EPR pair is still detectable, giving good perspective for our approach of a shuttle-based scalable quantum computing architecture in silicon. |
| title | Spin-EPR-pair separation by conveyor-mode single electron shuttling in Si/SiGe |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2307.04897 |