Observation of Strong Electron Correlation in Planetary Atomic Structure
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arXiv
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| Autori principali: | , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908902560366592 |
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| author | Yu, Xinglong Han, Yongyan Shen, Zhenjie Fang, Yong-Kang Ruan, Shushu Liu, Jie Wu, Zhixian Wang, Xincheng Chen, Ahai Jiang, Wei-Chao Ueda, Kiyoshi Peng, Liang-You Jiang, Yuhai |
| author_facet | Yu, Xinglong Han, Yongyan Shen, Zhenjie Fang, Yong-Kang Ruan, Shushu Liu, Jie Wu, Zhixian Wang, Xincheng Chen, Ahai Jiang, Wei-Chao Ueda, Kiyoshi Peng, Liang-You Jiang, Yuhai |
| contents | Unravelling two-electron correlation is a long-standing challenge at the heart of few-body quantum physics, underlying correlated phenomena across atomic, molecular and condensed-matter science. In prototypical three-body Coulomb systems, such strong correlation in doubly excited states (DESs) of planetary atomic systems leaves distinct signatures in nonsequential above-threshold double ionization (NS-ATDI) driven by coherent laser fields, yet such targeted study has long remained elusive. Here we present kinematically complete measurements of multi-photon double ionization in cold strontium atoms. Our results reveal a dominant NS-ATDI channel exhibiting well-defined band structures that encode pronounced energy and angular correlations between the two emitted electrons. Autoionization spectra confirm the presence of DESs as transition states that effectively promote the NS-ATDI process. These observations provide direct evidence that both electrons are synchronously excited and ionized via resonant high-lying DES transitions, meaning the structure-linked two-electron correlation of DES is preserved and propagated in the laser-driven time-dependent three-body system. Our work transcends the traditional paradigm of multi-photon double ionization, and fundamentally reshapes the core understanding of intrinsic electron correlation governing many-body systems in nature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_09102 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Observation of Strong Electron Correlation in Planetary Atomic Structure Yu, Xinglong Han, Yongyan Shen, Zhenjie Fang, Yong-Kang Ruan, Shushu Liu, Jie Wu, Zhixian Wang, Xincheng Chen, Ahai Jiang, Wei-Chao Ueda, Kiyoshi Peng, Liang-You Jiang, Yuhai Atomic Physics Unravelling two-electron correlation is a long-standing challenge at the heart of few-body quantum physics, underlying correlated phenomena across atomic, molecular and condensed-matter science. In prototypical three-body Coulomb systems, such strong correlation in doubly excited states (DESs) of planetary atomic systems leaves distinct signatures in nonsequential above-threshold double ionization (NS-ATDI) driven by coherent laser fields, yet such targeted study has long remained elusive. Here we present kinematically complete measurements of multi-photon double ionization in cold strontium atoms. Our results reveal a dominant NS-ATDI channel exhibiting well-defined band structures that encode pronounced energy and angular correlations between the two emitted electrons. Autoionization spectra confirm the presence of DESs as transition states that effectively promote the NS-ATDI process. These observations provide direct evidence that both electrons are synchronously excited and ionized via resonant high-lying DES transitions, meaning the structure-linked two-electron correlation of DES is preserved and propagated in the laser-driven time-dependent three-body system. Our work transcends the traditional paradigm of multi-photon double ionization, and fundamentally reshapes the core understanding of intrinsic electron correlation governing many-body systems in nature. |
| title | Observation of Strong Electron Correlation in Planetary Atomic Structure |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2603.09102 |