Trapped-ion two-qubit gates with >99.99% fidelity without ground-state cooling
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866912659889192960 |
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| author | Hughes, A. C. Srinivas, R. Löschnauer, C. M. Knaack, H. M. Matt, R. Ballance, C. J. Malinowski, M. Harty, T. P. Sutherland, R. T. |
| author_facet | Hughes, A. C. Srinivas, R. Löschnauer, C. M. Knaack, H. M. Matt, R. Ballance, C. J. Malinowski, M. Harty, T. P. Sutherland, R. T. |
| contents | We introduce the 'smooth gate', an entangling method for trapped-ion qubits where residual spin-motion entanglement errors are adiabatically eliminated by ramping the gate detuning. We demonstrate electronically controlled two-qubit gates with an estimated error of $8.4(7)\times10^{-5}$ without ground-state cooling. We further show that the error remains $\lesssim 5\times10^{-4}$ for ions with average phonon occupation up to $\bar{n}=9.4(3)$ on the gate mode. These results indicate that trapped-ion quantum computation can achieve high fidelity at temperatures above the Doppler limit, which enables faster and simpler device operation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_17286 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Trapped-ion two-qubit gates with >99.99% fidelity without ground-state cooling Hughes, A. C. Srinivas, R. Löschnauer, C. M. Knaack, H. M. Matt, R. Ballance, C. J. Malinowski, M. Harty, T. P. Sutherland, R. T. Quantum Physics Atomic Physics We introduce the 'smooth gate', an entangling method for trapped-ion qubits where residual spin-motion entanglement errors are adiabatically eliminated by ramping the gate detuning. We demonstrate electronically controlled two-qubit gates with an estimated error of $8.4(7)\times10^{-5}$ without ground-state cooling. We further show that the error remains $\lesssim 5\times10^{-4}$ for ions with average phonon occupation up to $\bar{n}=9.4(3)$ on the gate mode. These results indicate that trapped-ion quantum computation can achieve high fidelity at temperatures above the Doppler limit, which enables faster and simpler device operation. |
| title | Trapped-ion two-qubit gates with >99.99% fidelity without ground-state cooling |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2510.17286 |