Coherent spin qubit shuttling through germanium quantum dots
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866913433380716544 |
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| author | van Riggelen-Doelman, Floor Wang, Chien-An de Snoo, Sander L. Lawrie, William I. L. Hendrickx, Nico W. Rimbach-Russ, Maximilian Sammak, Amir Scappucci, Giordano Déprez, Corentin Veldhorst, Menno |
| author_facet | van Riggelen-Doelman, Floor Wang, Chien-An de Snoo, Sander L. Lawrie, William I. L. Hendrickx, Nico W. Rimbach-Russ, Maximilian Sammak, Amir Scappucci, Giordano Déprez, Corentin Veldhorst, Menno |
| contents | Quantum links can interconnect qubit registers and are therefore essential in networked quantum computing. Semiconductor quantum dot qubits have seen significant progress in the high-fidelity operation of small qubit registers but establishing a compelling quantum link remains a challenge. Here, we show that a spin qubit can be shuttled through multiple quantum dots while preserving its quantum information. Remarkably, we achieve these results using hole spin qubits in germanium, despite the presence of strong spin-orbit interaction. We accomplish the shuttling of spin basis states over effective lengths beyond 300 $μ$m and demonstrate the coherent shuttling of superposition states over effective lengths corresponding to 9 $μ$m, which we can extend to 49 $μ$m by incorporating dynamical decoupling. These findings indicate qubit shuttling as an effective approach to route qubits within registers and to establish quantum links between registers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_02406 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Coherent spin qubit shuttling through germanium quantum dots van Riggelen-Doelman, Floor Wang, Chien-An de Snoo, Sander L. Lawrie, William I. L. Hendrickx, Nico W. Rimbach-Russ, Maximilian Sammak, Amir Scappucci, Giordano Déprez, Corentin Veldhorst, Menno Mesoscale and Nanoscale Physics Quantum Physics Quantum links can interconnect qubit registers and are therefore essential in networked quantum computing. Semiconductor quantum dot qubits have seen significant progress in the high-fidelity operation of small qubit registers but establishing a compelling quantum link remains a challenge. Here, we show that a spin qubit can be shuttled through multiple quantum dots while preserving its quantum information. Remarkably, we achieve these results using hole spin qubits in germanium, despite the presence of strong spin-orbit interaction. We accomplish the shuttling of spin basis states over effective lengths beyond 300 $μ$m and demonstrate the coherent shuttling of superposition states over effective lengths corresponding to 9 $μ$m, which we can extend to 49 $μ$m by incorporating dynamical decoupling. These findings indicate qubit shuttling as an effective approach to route qubits within registers and to establish quantum links between registers. |
| title | Coherent spin qubit shuttling through germanium quantum dots |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2308.02406 |