Optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control
Spectator qubits (SQs) are a tool to mitigate noise in hard-to-access data qubits. The SQ, designed to be much more sensitive to the noise, is measured frequently, and the accumulated results used rarely to correct the data qubits. For the hardware-relevant example of dephasing from random telegraph...
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th-mahidol.822412023-05-19T14:54:55Z Optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control Song H. Mahidol University Physics and Astronomy Spectator qubits (SQs) are a tool to mitigate noise in hard-to-access data qubits. The SQ, designed to be much more sensitive to the noise, is measured frequently, and the accumulated results used rarely to correct the data qubits. For the hardware-relevant example of dephasing from random telegraph noise, we introduce a Bayesian method employing complex linear maps which leads to a plausibly optimal adaptive measurement and control protocol. The suppression of the decoherence rate is quadratic in the SQ sensitivity, establishing that the SQ paradigm works arbitrarily well in the right regime. 2023-05-19T07:54:55Z 2023-05-19T07:54:55Z 2023-03-01 Article Physical Review A Vol.107 No.3 (2023) 10.1103/PhysRevA.107.L030601 24699934 24699926 2-s2.0-85149658416 https://repository.li.mahidol.ac.th/handle/123456789/82241 SCOPUS |
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Physics and Astronomy Song H. Optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control |
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Spectator qubits (SQs) are a tool to mitigate noise in hard-to-access data qubits. The SQ, designed to be much more sensitive to the noise, is measured frequently, and the accumulated results used rarely to correct the data qubits. For the hardware-relevant example of dephasing from random telegraph noise, we introduce a Bayesian method employing complex linear maps which leads to a plausibly optimal adaptive measurement and control protocol. The suppression of the decoherence rate is quadratic in the SQ sensitivity, establishing that the SQ paradigm works arbitrarily well in the right regime. |
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Mahidol University |
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Mahidol University Song H. |
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Article |
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Song H. |
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Song H. |
| title |
Optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control |
| title_short |
Optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control |
| title_full |
Optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control |
| title_fullStr |
Optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control |
| title_full_unstemmed |
Optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control |
| title_sort |
optimized mitigation of random-telegraph-noise dephasing by spectator-qubit sensing and control |
| publishDate |
2023 |
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https://repository.li.mahidol.ac.th/handle/123456789/82241 |
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1781414793509339136 |