High-fidelity entanglement of metastable trapped-ion qubits with integrated erasure conversion
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866908894922539008 |
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| author | Quinn, A. Gregory, G. J. Moore, I. D. Brudney, S. Metzner, J. Ritchie, E. R. O'Reilly, J. Wineland, D. J. Allcock, D. T. C. |
| author_facet | Quinn, A. Gregory, G. J. Moore, I. D. Brudney, S. Metzner, J. Ritchie, E. R. O'Reilly, J. Wineland, D. J. Allcock, D. T. C. |
| contents | Today's most advanced ion trap quantum computers have significant overhead due to the need for dual-species operation. Looking ahead, logical qubit register sizes will be limited by the encoding rate needed to correct generic Pauli errors. We address both of these issues by establishing high-fidelity control of metastable qubits, a key component of \textit{omg} or dual-type architectures, which enables converting a significant fraction of gate errors to erasures. We first implement an erasure conversion scheme which enables detection of $\sim 94\%$ of spontaneous Raman scattering errors during logic gates and nearly all errors from qubit decay. Second, we perform a two-ion geometric phase gate using far-detuned (-44\,THz) stimulated Raman transitions to produce an entangled state with a raw Bell state fidelity of 97.73\% and a SPAM-corrected Bell state fidelity of 98.61\%. When subtracting erasure errors, this fidelity becomes 99.16\%. These results, along with projections based on our detailed error budget, demonstrate metastable trapped-ion qubits as a platform for low-overhead, fault-tolerant quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_12727 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-fidelity entanglement of metastable trapped-ion qubits with integrated erasure conversion Quinn, A. Gregory, G. J. Moore, I. D. Brudney, S. Metzner, J. Ritchie, E. R. O'Reilly, J. Wineland, D. J. Allcock, D. T. C. Atomic Physics Quantum Physics Today's most advanced ion trap quantum computers have significant overhead due to the need for dual-species operation. Looking ahead, logical qubit register sizes will be limited by the encoding rate needed to correct generic Pauli errors. We address both of these issues by establishing high-fidelity control of metastable qubits, a key component of \textit{omg} or dual-type architectures, which enables converting a significant fraction of gate errors to erasures. We first implement an erasure conversion scheme which enables detection of $\sim 94\%$ of spontaneous Raman scattering errors during logic gates and nearly all errors from qubit decay. Second, we perform a two-ion geometric phase gate using far-detuned (-44\,THz) stimulated Raman transitions to produce an entangled state with a raw Bell state fidelity of 97.73\% and a SPAM-corrected Bell state fidelity of 98.61\%. When subtracting erasure errors, this fidelity becomes 99.16\%. These results, along with projections based on our detailed error budget, demonstrate metastable trapped-ion qubits as a platform for low-overhead, fault-tolerant quantum computing. |
| title | High-fidelity entanglement of metastable trapped-ion qubits with integrated erasure conversion |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2411.12727 |