Conveyor-mode electron shuttling through a T-junction in Si/SiGe
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866917188448813056 |
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| author | Beer, Max Xue, Ran Deda, Lennart Trellenkamp, Stefan Tu, Jhih-Sian Surrey, Paul Seidler, Inga Bluhm, Hendrik Schreiber, Lars R. |
| author_facet | Beer, Max Xue, Ran Deda, Lennart Trellenkamp, Stefan Tu, Jhih-Sian Surrey, Paul Seidler, Inga Bluhm, Hendrik Schreiber, Lars R. |
| contents | Conveyor-mode shuttling in gated Si/SiGe devices enables adiabatic transfer of single electrons, electron patterns and spin qubits confined in quantum dots across several microns with a scalable number of signal lines. To realize their full potential, linear shuttle lanes must connect into a two-dimensional grid with controllable routing. We introduce a T-junction device linking two independently driven shuttle lanes. Electron routing across the junction requires no extra control lines beyond the four channels per conveyor belt. We measure an inter-lane charge transfer fidelity of $F = 100.0000000^{+0}_{-9\times 10^{-7}}\,\%$ at an instantaneous electron velocity of $270\,\mathrm{mm}\,\mathrm{s}^{-1}$. The filling of 54 quantum dots is controlled by simple atomic pulses, allowing us to swap electron patterns, laying the groundwork for a native spin-qubit SWAP gate. This T-junction establishes a path towards scalable, two-dimensional quantum computing architectures with flexible spin qubit routing for quantum error correction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_03942 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Conveyor-mode electron shuttling through a T-junction in Si/SiGe Beer, Max Xue, Ran Deda, Lennart Trellenkamp, Stefan Tu, Jhih-Sian Surrey, Paul Seidler, Inga Bluhm, Hendrik Schreiber, Lars R. Mesoscale and Nanoscale Physics Quantum Physics Conveyor-mode shuttling in gated Si/SiGe devices enables adiabatic transfer of single electrons, electron patterns and spin qubits confined in quantum dots across several microns with a scalable number of signal lines. To realize their full potential, linear shuttle lanes must connect into a two-dimensional grid with controllable routing. We introduce a T-junction device linking two independently driven shuttle lanes. Electron routing across the junction requires no extra control lines beyond the four channels per conveyor belt. We measure an inter-lane charge transfer fidelity of $F = 100.0000000^{+0}_{-9\times 10^{-7}}\,\%$ at an instantaneous electron velocity of $270\,\mathrm{mm}\,\mathrm{s}^{-1}$. The filling of 54 quantum dots is controlled by simple atomic pulses, allowing us to swap electron patterns, laying the groundwork for a native spin-qubit SWAP gate. This T-junction establishes a path towards scalable, two-dimensional quantum computing architectures with flexible spin qubit routing for quantum error correction. |
| title | Conveyor-mode electron shuttling through a T-junction in Si/SiGe |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2601.03942 |