Formation and Dissociation of Field-Linked Tetramers

• URL: http://arxiv.org/abs/2405.13645v1
• Date: Wed, 22 May 2024 13:48:35 GMT
• Title: Formation and Dissociation of Field-Linked Tetramers
• Authors: Fulin Deng, Xing-Yan Chen, Xin-Yu Luo, Wenxian Zhang, Su Yi, Tao Shi,
• Abstract summary: We show that, compared to the lowest tetramer state, higher tetramer states typically have longer lifetimes. To detect tetramers, we identify the distinctive time-of-flight images from ramp dissociation. Remarkably, in the modulational dissociation of tetramers, we find that multi-photon processes induce dissociation even below the threshold modulation frequency.
• Score: 3.9539193969024358
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: We investigate the static and dynamic properties of tetratomic molecules formed by two microwave-shielded polar molecules across field-linked resonances. In particular, we focus on two-body physics and experimental techniques unexplored in the recent experiment [X.-Y. Chen {\it et al}., Nature {\bf626}, 283 (2024)]. We show that, compared to the lowest tetramer state, higher tetramer states typically have longer lifetimes, which may facilitate a further cooling of tetramer gases towards quantum degeneracy. To detect tetramers, we identify the distinctive time-of-flight images from ramp dissociation, which can be observed by lowering the ramp rate of the microwave. Remarkably, in the modulational dissociation of tetramers, we find that multi-photon processes induce dissociation even below the threshold modulation frequency when the modulation amplitude is sufficiently high. Given the universal form of the inter-molecular potential for microwave-shielded polar molecules, our results also apply to other molecular gases widely explored in recent experiments.

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