Entanglement of a nuclear spin qubit register in silicon photonics
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915670124396544 |
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| author | Song, Hanbin Zhang, Xueyue Komza, Lukasz Fiaschi, Niccolo Xiong, Yihuang Zhi, Yiyang Dhuey, Scott Schwartzberg, Adam Schenkel, Thomas Hautier, Geoffroy Zhang, Zi-Huai Sipahigil, Alp |
| author_facet | Song, Hanbin Zhang, Xueyue Komza, Lukasz Fiaschi, Niccolo Xiong, Yihuang Zhi, Yiyang Dhuey, Scott Schwartzberg, Adam Schenkel, Thomas Hautier, Geoffroy Zhang, Zi-Huai Sipahigil, Alp |
| contents | Color centers provide an optical interface to quantum registers based on electron and nuclear spin qubits in solids. The T center in silicon is an emerging spin-photon interface that combines telecom O-band optical transitions and an electron spin in a scalable photonics platform. In this work, we demonstrate the initialization, coherent control, and state readout of a three-qubit register based on the electron spin of a T center coupled to a hydrogen and a silicon nuclear spin. The spin register exhibits spin echo coherence times of $0.41(2)$~ms for the electron spin, $112(12)$~ms for the hydrogen nuclear spin, and $67(7)$~ms for the silicon nuclear spin. We use nuclear-nuclear two-qubit gates to generate entanglement between the two nuclear spins with a fidelity of $F=0.77(3)$ and a coherence time of $T^*_2=2.60(8)$~ms. Our results show that a T center in silicon photonics can realize a multi-qubit register with an optical interface for quantum communication. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_15467 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Entanglement of a nuclear spin qubit register in silicon photonics Song, Hanbin Zhang, Xueyue Komza, Lukasz Fiaschi, Niccolo Xiong, Yihuang Zhi, Yiyang Dhuey, Scott Schwartzberg, Adam Schenkel, Thomas Hautier, Geoffroy Zhang, Zi-Huai Sipahigil, Alp Quantum Physics Mesoscale and Nanoscale Physics Optics Color centers provide an optical interface to quantum registers based on electron and nuclear spin qubits in solids. The T center in silicon is an emerging spin-photon interface that combines telecom O-band optical transitions and an electron spin in a scalable photonics platform. In this work, we demonstrate the initialization, coherent control, and state readout of a three-qubit register based on the electron spin of a T center coupled to a hydrogen and a silicon nuclear spin. The spin register exhibits spin echo coherence times of $0.41(2)$~ms for the electron spin, $112(12)$~ms for the hydrogen nuclear spin, and $67(7)$~ms for the silicon nuclear spin. We use nuclear-nuclear two-qubit gates to generate entanglement between the two nuclear spins with a fidelity of $F=0.77(3)$ and a coherence time of $T^*_2=2.60(8)$~ms. Our results show that a T center in silicon photonics can realize a multi-qubit register with an optical interface for quantum communication. |
| title | Entanglement of a nuclear spin qubit register in silicon photonics |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2504.15467 |