Creation and precise spectroscopy of $^{86}$Sr$_2$ halo molecules
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866912814317174784 |
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| author | Iritani, Brandon Huang, Jingjing Xu, Wenwei Sim, Gisung Moszynski, Robert Zelevinsky, Tanya |
| author_facet | Iritani, Brandon Huang, Jingjing Xu, Wenwei Sim, Gisung Moszynski, Robert Zelevinsky, Tanya |
| contents | We report on the creation of $^{86}$Sr$_2$ molecules in the halo state and neighboring weakly bound states. Efficient molecule production via one-photon photoassociation relies on sufficient wavefunction overlap between the target vibrational states in the electronic excited- and ground-state potentials. Using Autler-Townes spectroscopy, transition strengths are measured to identify optimal pathways for production of weakly bound molecules. Vibrational splittings for the three least-bound vibrational states are measured, and dominant systematic uncertainties are evaluated with uncertainties below 100 Hz. From these splittings, absolute binding energies for these weakly bound vibrational states are determined. The results pave the way to a molecular isotope shift measurement with Sr$_2$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2601_06319 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Creation and precise spectroscopy of $^{86}$Sr$_2$ halo molecules Iritani, Brandon Huang, Jingjing Xu, Wenwei Sim, Gisung Moszynski, Robert Zelevinsky, Tanya Atomic Physics Atomic and Molecular Clusters Chemical Physics Quantum Physics We report on the creation of $^{86}$Sr$_2$ molecules in the halo state and neighboring weakly bound states. Efficient molecule production via one-photon photoassociation relies on sufficient wavefunction overlap between the target vibrational states in the electronic excited- and ground-state potentials. Using Autler-Townes spectroscopy, transition strengths are measured to identify optimal pathways for production of weakly bound molecules. Vibrational splittings for the three least-bound vibrational states are measured, and dominant systematic uncertainties are evaluated with uncertainties below 100 Hz. From these splittings, absolute binding energies for these weakly bound vibrational states are determined. The results pave the way to a molecular isotope shift measurement with Sr$_2$. |
| title | Creation and precise spectroscopy of $^{86}$Sr$_2$ halo molecules |
| topic | Atomic Physics Atomic and Molecular Clusters Chemical Physics Quantum Physics |
| url | https://arxiv.org/abs/2601.06319 |