Fault-tolerant hyper-Ramsey spectroscopy of optical clock transitions with dynamical decoupling
This research introduces Dynamically Decoupled Hyper-Ramsey (DDHR) spectroscopy to make optical clock interrogation fault-tolerant. It uses a novel three-pulse sequence that eliminates sensitivity to probe intensity fluctuations and residual frequency shifts caused by the probe laser. This method outperforms standard hyper-Ramsey techniques, offering a robust protocol for high-precision quantum sensing.