| Autor: |
Struck, Tom, Volmer, Mats, Visser, Lino, Offermann, Tobias, Xue, Ran, Tu, Jhih-Sian, Trellenkamp, Stefan, Cywiński, Łukasz, Bluhm, Hendrik, Schreiber, Lars R. |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Nat. Commun. 15, 1325 (2024) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41467-024-45583-7 |
| Popis: |
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 $\mu$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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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