Fault-tolerant dynamically-decoupled hyper-Ramsey spectroscopy of ultra-narrow clock transitions
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866917167954395136 |
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| author | Zanon-Willette, T. Ilikj, B. Wilkowski, D. Darquié, B. Vitanov, N. V. |
| author_facet | Zanon-Willette, T. Ilikj, B. Wilkowski, D. Darquié, B. Vitanov, N. V. |
| contents | Hyper-Ramsey protocols effectively reduce AC-Stark shifts in probing ultra-narrow optical clock transitions but they remain sensitive to laser intensity noise, decoherence, frequency drifts, and low-frequency perturbations. We address these limitations by incorporating dynamical decoupling, using sequences of rotary Hahn-echo pulses that toggle the probe frequency detuning and phase between opposite signs. Implementing time-optimized Eulerian cycling circuits of multiple refocusing pulses, we generate high-contrast hyper-Ramsey interferences that are completely free from AC-Stark shifts and robust against environmental noise and laser probe parameters imperfections. We demonstrate the robustness of our dynamically-decoupled hyper-Ramsey interrogation scheme by implementing it directly at the pulse level on a superconducting quantum processing unit. Fault tolerant dynamically-decoupled SU(2) hyper-clocks are a significant step toward universal, noise resilient quantum sensors, enabling fault-tolerant metrology for searches about new physics beyond the Standard Model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_23091 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fault-tolerant dynamically-decoupled hyper-Ramsey spectroscopy of ultra-narrow clock transitions Zanon-Willette, T. Ilikj, B. Wilkowski, D. Darquié, B. Vitanov, N. V. Atomic Physics Quantum Physics Hyper-Ramsey protocols effectively reduce AC-Stark shifts in probing ultra-narrow optical clock transitions but they remain sensitive to laser intensity noise, decoherence, frequency drifts, and low-frequency perturbations. We address these limitations by incorporating dynamical decoupling, using sequences of rotary Hahn-echo pulses that toggle the probe frequency detuning and phase between opposite signs. Implementing time-optimized Eulerian cycling circuits of multiple refocusing pulses, we generate high-contrast hyper-Ramsey interferences that are completely free from AC-Stark shifts and robust against environmental noise and laser probe parameters imperfections. We demonstrate the robustness of our dynamically-decoupled hyper-Ramsey interrogation scheme by implementing it directly at the pulse level on a superconducting quantum processing unit. Fault tolerant dynamically-decoupled SU(2) hyper-clocks are a significant step toward universal, noise resilient quantum sensors, enabling fault-tolerant metrology for searches about new physics beyond the Standard Model. |
| title | Fault-tolerant dynamically-decoupled hyper-Ramsey spectroscopy of ultra-narrow clock transitions |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2506.23091 |