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<p>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&#xa0;cm<sup>−1</sup>Hz<sup>−1/2</sup>. The measurement is also dependent on the interaction time, optical depth and principal quantum number since the long-range interaction between Rydberg atoms could dramatically change the shape of hysteresis trajectories. The reported results suggest that flipping trajectory features in cold Rydberg many-body systems could advance sensing and metrology applications.</p>

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Quantum enhanced metrology based on flipping trajectory of cold Rydberg gases

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月12日

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  • Ya-Jun Wang,
  • Jun Zhang,
  • Zheng-Yuan Zhang,
  • Shi-Yao Shao,
  • Qing Li,
  • Han-Chao Chen,
  • Yu Ma,
  • Tian-Yu Han,
  • Qi-Feng Wang,
  • Jia-Dou Nan,
  • Yi-Ming Yin,
  • Dong-Yang Zhu,
  • Qiao-Qiao Fang,
  • Chao Yu,
  • Xin Liu,
  • Guang-Can Guo,
  • Bang Liu,
  • Li-Hua Zhang,
  • Dong-Sheng Ding,
  • Bao-Sen Shi

摘要

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, optical depth and principal quantum number since the long-range interaction between Rydberg atoms could dramatically change the shape of hysteresis trajectories. The reported results suggest that flipping trajectory features in cold Rydberg many-body systems could advance sensing and metrology applications.