Quantum enhanced metrology based on flipping trajectory of cold Rydberg gases.

ABSTRACT: The dynamical trajectory of a dissipative Rydberg many-body system could be flipped under a microwave field driving, displaying an enhanced sensitivity. This is because the intersection of the folded hysteresis trajectories exhibits a sharp peak near the phase transition, amplifying the response to small changes in the microwave field. Here, we demonstrate an experiment of enhanced metrology through flipping the hysteresis trajectory in a cold atomic system, displaying an approach to improve sensitivity by the gap-closing points. By measuring the intersection points of hysteresis trajectories versus Rabi frequency of the microwave field, we quantify the equivalent sensitivity to be 1.6(5) nV cm^-1Hz^-1/2. The measurement is also dependent on the interaction time, optica

SUBMITTER: Wang YJ 

PROVIDER: S-EPMC12858863 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature