Optimal Two-Qubit Gates for Group-IV Color-Centers in Diamond
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866911588563288064 |
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| author | Frey, Jurek Senkalla, Katharina Vetter, Philipp J. Jelezko, Fedor Wilhelm, Frank K. Müller, Matthias M. |
| author_facet | Frey, Jurek Senkalla, Katharina Vetter, Philipp J. Jelezko, Fedor Wilhelm, Frank K. Müller, Matthias M. |
| contents | Color centers associated with group-IV dopants in diamond with long-lived nuclear spins have emerged as major candidates for distributed quantum computing nodes and quantum repeaters. Several proof-of-principle experiments have already been demonstrated. A key operation for long-distance entanglement-distribution protocols are fast and robust gates between the electron spin and a nuclear spin. Here, we investigate numerically for an existing experimental platform of a Germanium-vacancy (GeV) center with a strongly-coupled ${}^{13}$C spin, how such gates can be implemented via quantum optimal control. In the presence of realistic noise we investigate different parameter regimes and gate operations and obtain robust two-qubit gates with fidelities exceeding $99.9 \%$. The framework provides a scalable strategy for group-IV quantum nodes and can be adapted to related architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_11340 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Optimal Two-Qubit Gates for Group-IV Color-Centers in Diamond Frey, Jurek Senkalla, Katharina Vetter, Philipp J. Jelezko, Fedor Wilhelm, Frank K. Müller, Matthias M. Quantum Physics Color centers associated with group-IV dopants in diamond with long-lived nuclear spins have emerged as major candidates for distributed quantum computing nodes and quantum repeaters. Several proof-of-principle experiments have already been demonstrated. A key operation for long-distance entanglement-distribution protocols are fast and robust gates between the electron spin and a nuclear spin. Here, we investigate numerically for an existing experimental platform of a Germanium-vacancy (GeV) center with a strongly-coupled ${}^{13}$C spin, how such gates can be implemented via quantum optimal control. In the presence of realistic noise we investigate different parameter regimes and gate operations and obtain robust two-qubit gates with fidelities exceeding $99.9 \%$. The framework provides a scalable strategy for group-IV quantum nodes and can be adapted to related architectures. |
| title | Optimal Two-Qubit Gates for Group-IV Color-Centers in Diamond |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.11340 |