Optical excitation and stabilization of ultracold field-linked tetratomic molecules
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| Format: | Preprint |
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2025
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| _version_ | 1866909982458380288 |
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| author | Mukherjee, Bijit Tomza, Michał |
| author_facet | Mukherjee, Bijit Tomza, Michał |
| contents | We propose a coherent optical population transfer of weakly bound field-linked (FL) tetratomic molecules (tetramers) to deeper FL bound states using stimulated Raman adiabatic passage. We consider static-electric-field shielded polar alkali-metal diatomic molecules and corresponding FL tetramers in their $\textrm{X}^1Σ^+$+$\textrm{X}^1Σ^+$ ground electronic state. We show that the excited metastable $\textrm{X}^1Σ^+$+$\textrm{b}^3Π$ electronic manifold supports FL tetramers in a broader range of electric fields with collisional shielding extended to zero field. We calculate the Franck-Condon factors between the ground and excited FL tetramers and show that they are highly tunable with the electric field. We also predict photoassociation of ground-state shielded molecules to the excited FL states in free-bound optical transitions. We propose proof-of-principle experiments to implement stimulated Raman adiabatic passage and photoassociation using FL tetramers, paving the way for the formation of deeply bound ultracold polyatomic molecules. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_17341 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optical excitation and stabilization of ultracold field-linked tetratomic molecules Mukherjee, Bijit Tomza, Michał Atomic Physics Quantum Gases Chemical Physics We propose a coherent optical population transfer of weakly bound field-linked (FL) tetratomic molecules (tetramers) to deeper FL bound states using stimulated Raman adiabatic passage. We consider static-electric-field shielded polar alkali-metal diatomic molecules and corresponding FL tetramers in their $\textrm{X}^1Σ^+$+$\textrm{X}^1Σ^+$ ground electronic state. We show that the excited metastable $\textrm{X}^1Σ^+$+$\textrm{b}^3Π$ electronic manifold supports FL tetramers in a broader range of electric fields with collisional shielding extended to zero field. We calculate the Franck-Condon factors between the ground and excited FL tetramers and show that they are highly tunable with the electric field. We also predict photoassociation of ground-state shielded molecules to the excited FL states in free-bound optical transitions. We propose proof-of-principle experiments to implement stimulated Raman adiabatic passage and photoassociation using FL tetramers, paving the way for the formation of deeply bound ultracold polyatomic molecules. |
| title | Optical excitation and stabilization of ultracold field-linked tetratomic molecules |
| topic | Atomic Physics Quantum Gases Chemical Physics |
| url | https://arxiv.org/abs/2506.17341 |