Fault-tolerant dynamically-decoupled hyper-Ramsey spectroscopy of ultra-narrow clock transitions

2025/06/29 by T. Zanon-Willette, Branislav Ilikj, Zanon-Willette, T. +7 · 1 citation
Computer Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Quantum Information and Cryptography #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2506.23091

openalex publication_date 2025/06/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02

Abstract

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.

Citations

• Unified laboratory-frame analysis of atomic gravitational-wave sensors
• Cyclicity of interaction frame transformations
• Dynamical decoupling of interacting spins through group factorization
• High-Stability Single-Ion Clock with 5.5×10^-19 Systematic Uncertainty
• Quantum-amplified global-phase spectroscopy on an optical clock transition
• A High-Power Clock Laser Spectrally Tailored for High-Fidelity Quantum State Engineering
• Operating a multi-ion clock with dynamical decoupling
• Precision spectroscopy in Yb+ ions
• Multi-ion frequency reference using dynamical decoupling
• Robust and scalable rf spectroscopy in first-order magnetic sensitive states at second-long coherence time
• Quantum sensing for particle physics
• Quantum metrology algorithms for dark matter searches with clocks
• ¹⁷⁶Lu⁺ clock comparison at the 10^-18 level via correlation spectroscopy
• Nuclear clocks for testing fundamental physics
• Dynamic decoupling of laser phase noise in compound atomic clocks
• Quantum sensing
• NMR techniques for quantum control and computation

Cited by

• Unified laboratory-frame analysis of atomic gravitational-wave sensors

Related

• Hyper Ramsey-Bordé matter-wave interferometry for robust quantum sensors
• Beating the Ramsey limit on sensing with deterministic qubit control
• Compensation of field-induced frequency shifts in Ramsey spectroscopy of optical clock transitions
• Numerical test of few-qubit clock protocols
• Reducing the instability of an optical lattice clock using multiple atomic ensembles