Long coherence silicon spin qubit fabricated in a 300 mm industrial foundry
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915692953993216 |
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| author | Tomić, Petar Bütler, Patrick Wu, Yuze Raes, Bart Godfrin, Clement Kubicek, Stefan Jussot, Julien Canvel, Yann Hermans, Yannick Shimura, Yosuke Loo, Roger Beyne, Sofie Jaliel, Gulzat Van Caekenberghe, Thomas Levajac, Vukan Wan, Danny De Greve, Kristiaan Huang, Wister Wei Ensslin, Klaus Ihn, Thomas |
| author_facet | Tomić, Petar Bütler, Patrick Wu, Yuze Raes, Bart Godfrin, Clement Kubicek, Stefan Jussot, Julien Canvel, Yann Hermans, Yannick Shimura, Yosuke Loo, Roger Beyne, Sofie Jaliel, Gulzat Van Caekenberghe, Thomas Levajac, Vukan Wan, Danny De Greve, Kristiaan Huang, Wister Wei Ensslin, Klaus Ihn, Thomas |
| contents | Silicon spin qubits offer long coherence times, a compact footprint and compatibility with industrial CMOS manufacturing. Here, we investigate spin qubits hosted in quantum dots fabricated in a state-of-the-art 300 mm nanoelectronics foundry and demonstrate substantially enhanced coherence, achieving a Hahn-echo time of $T_2^{\text{Hahn}} = 4\,\mathrm{ms}$ for singlet--triplet oscillations. Employing noise spectroscopy and noise correlation measurements, we identify detuning noise with an amplitude of $δ\varepsilon_{\mathrm{rms}} = 2.2\,μ\mathrm{eV}$ (integrated over 90 s) and observe strong zero-phase correlations between two spatially separated spin qubits. The singlet--triplet basis intrinsically rejects these common-mode fluctuations, yielding a pronounced suppression of dephasing. Our results suggest that exploiting the versatility of silicon quantum dots to adapt the qubit encoding to the microscopic noise landscape represents a promising strategy for advancing scalable quantum information processing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_20758 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Long coherence silicon spin qubit fabricated in a 300 mm industrial foundry Tomić, Petar Bütler, Patrick Wu, Yuze Raes, Bart Godfrin, Clement Kubicek, Stefan Jussot, Julien Canvel, Yann Hermans, Yannick Shimura, Yosuke Loo, Roger Beyne, Sofie Jaliel, Gulzat Van Caekenberghe, Thomas Levajac, Vukan Wan, Danny De Greve, Kristiaan Huang, Wister Wei Ensslin, Klaus Ihn, Thomas Mesoscale and Nanoscale Physics Silicon spin qubits offer long coherence times, a compact footprint and compatibility with industrial CMOS manufacturing. Here, we investigate spin qubits hosted in quantum dots fabricated in a state-of-the-art 300 mm nanoelectronics foundry and demonstrate substantially enhanced coherence, achieving a Hahn-echo time of $T_2^{\text{Hahn}} = 4\,\mathrm{ms}$ for singlet--triplet oscillations. Employing noise spectroscopy and noise correlation measurements, we identify detuning noise with an amplitude of $δ\varepsilon_{\mathrm{rms}} = 2.2\,μ\mathrm{eV}$ (integrated over 90 s) and observe strong zero-phase correlations between two spatially separated spin qubits. The singlet--triplet basis intrinsically rejects these common-mode fluctuations, yielding a pronounced suppression of dephasing. Our results suggest that exploiting the versatility of silicon quantum dots to adapt the qubit encoding to the microscopic noise landscape represents a promising strategy for advancing scalable quantum information processing. |
| title | Long coherence silicon spin qubit fabricated in a 300 mm industrial foundry |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2512.20758 |