Comparison of trapped-ion entangling gate mechanisms for mixed species
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914051014000640 |
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| author | Schäfer, V. M. Hughes, A. C. Bazavan, O. Thirumalai, K. Pagano, G. Ballance, C. J. Lucas, D. M. |
| author_facet | Schäfer, V. M. Hughes, A. C. Bazavan, O. Thirumalai, K. Pagano, G. Ballance, C. J. Lucas, D. M. |
| contents | Entangling gates are an essential capability of quantum computers. There are different methods for implementing two-qubit gates, with respective advantages and disadvantages. We investigate the experimentally relevant differences and commonalities of laser-based $σ_z\otimesσ_z$ light-shift and $σ_ϕ\otimesσ_ϕ$ Moelmer-Soerensen gates, highlighting the phases of experimental control fields and their long-term stabilities, in the specific case of mixed-species gates. We implement these gates on qubits with very different magnetic field sensitivities, encoded in $^{43}\mathrm{Ca}^+$ and $^{88}\mathrm{Sr}^+$, achieving fidelities of $99.8\%$ for the $σ_z\otimesσ_z$ and $99.6\%$ for the $σ_ϕ\otimesσ_ϕ$ gate. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_17893 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Comparison of trapped-ion entangling gate mechanisms for mixed species Schäfer, V. M. Hughes, A. C. Bazavan, O. Thirumalai, K. Pagano, G. Ballance, C. J. Lucas, D. M. Quantum Physics Atomic Physics Entangling gates are an essential capability of quantum computers. There are different methods for implementing two-qubit gates, with respective advantages and disadvantages. We investigate the experimentally relevant differences and commonalities of laser-based $σ_z\otimesσ_z$ light-shift and $σ_ϕ\otimesσ_ϕ$ Moelmer-Soerensen gates, highlighting the phases of experimental control fields and their long-term stabilities, in the specific case of mixed-species gates. We implement these gates on qubits with very different magnetic field sensitivities, encoded in $^{43}\mathrm{Ca}^+$ and $^{88}\mathrm{Sr}^+$, achieving fidelities of $99.8\%$ for the $σ_z\otimesσ_z$ and $99.6\%$ for the $σ_ϕ\otimesσ_ϕ$ gate. |
| title | Comparison of trapped-ion entangling gate mechanisms for mixed species |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2509.17893 |