High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers
Diamond is a promising platform for quantum information processing as it can host highly coherent qubits that could allow for the construction of large quantum registers. A prerequisite for such devices is a coherent interaction between nitrogen-vacancy (NV) electron spins enabling scalable entangle...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-05-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.15.021069 |
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| _version_ | 1849326854959267840 |
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| author | T. Joas F. Ferlemann R. Sailer P. J. Vetter J. Zhang R. S. Said T. Teraji S. Onoda T. Calarco G. Genov M. M. Müller F. Jelezko |
| author_facet | T. Joas F. Ferlemann R. Sailer P. J. Vetter J. Zhang R. S. Said T. Teraji S. Onoda T. Calarco G. Genov M. M. Müller F. Jelezko |
| author_sort | T. Joas |
| collection | DOAJ |
| description | Diamond is a promising platform for quantum information processing as it can host highly coherent qubits that could allow for the construction of large quantum registers. A prerequisite for such devices is a coherent interaction between nitrogen-vacancy (NV) electron spins enabling scalable entanglement. Entanglement between dipolar-coupled NV spin pairs has been demonstrated but with a limited fidelity, and its error sources have not been characterized. Here, we design and implement a robust two-qubit gate between NV electron spins in diamond and quantify the influence of multiple error sources on the gate performance. Experimentally, we demonstrate a record gate fidelity of F_{2q}=(96.0±2.5)% under ambient conditions. Our identification of the dominant errors paves the way towards NV-NV gates beyond the error correction threshold. |
| format | Article |
| id | doaj-art-a1afa5d1ddd14b4e837c6853332e6dae |
| institution | Kabale University |
| issn | 2160-3308 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj-art-a1afa5d1ddd14b4e837c6853332e6dae2025-08-20T03:48:02ZengAmerican Physical SocietyPhysical Review X2160-33082025-05-0115202106910.1103/PhysRevX.15.021069High-Fidelity Electron Spin Gates for Scaling Diamond Quantum RegistersT. JoasF. FerlemannR. SailerP. J. VetterJ. ZhangR. S. SaidT. TerajiS. OnodaT. CalarcoG. GenovM. M. MüllerF. JelezkoDiamond is a promising platform for quantum information processing as it can host highly coherent qubits that could allow for the construction of large quantum registers. A prerequisite for such devices is a coherent interaction between nitrogen-vacancy (NV) electron spins enabling scalable entanglement. Entanglement between dipolar-coupled NV spin pairs has been demonstrated but with a limited fidelity, and its error sources have not been characterized. Here, we design and implement a robust two-qubit gate between NV electron spins in diamond and quantify the influence of multiple error sources on the gate performance. Experimentally, we demonstrate a record gate fidelity of F_{2q}=(96.0±2.5)% under ambient conditions. Our identification of the dominant errors paves the way towards NV-NV gates beyond the error correction threshold.http://doi.org/10.1103/PhysRevX.15.021069 |
| spellingShingle | T. Joas F. Ferlemann R. Sailer P. J. Vetter J. Zhang R. S. Said T. Teraji S. Onoda T. Calarco G. Genov M. M. Müller F. Jelezko High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers Physical Review X |
| title | High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers |
| title_full | High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers |
| title_fullStr | High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers |
| title_full_unstemmed | High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers |
| title_short | High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers |
| title_sort | high fidelity electron spin gates for scaling diamond quantum registers |
| url | http://doi.org/10.1103/PhysRevX.15.021069 |
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