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arXiv · 2504.10799

Double-optical phase-transition in a three level Rydberg state in thermal Rubidium vapor

Lin Cheng·Kun Huang·Chunhui Shao·Fan Wu·Zhiyuan Xiong·Yanpeng Zhang
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Abstract

We report on the observation of electromagnetically induced transparency (EIT) with intrinsic phase transitions in a three-level ladder system within rubidium atomic vapor. The observed abrupt transitions between low and high Rydberg occupancy states manifest in the probe beam transmission, depending on the principal quantum number, the Rabi frequency of the coupling field, atomic density, and probe beam detuning. Our study elucidates the underlying interaction mechanisms governing the EIT phase transition and enriches the existing experiments of multi-parameter regulation phase transitions. These findings establish a robust platform for investigating nonequilibrium phase transitions in atomic ensembles, bridging the gap between classical mean-field theories and microscopic quantum dynamics.

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Lin Cheng, Kun Huang, Chunhui Shao, Fan Wu, Zhiyuan Xiong, Yanpeng Zhang. 2025-04-15. Double-optical phase-transition in a three level Rydberg state in thermal Rubidium vapor. https://arxiv.org/abs/2504.10799

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