Precision spectroscopy of negative-ion resonances in ultralong-range Rydberg molecules
| Autor: | Engel, Felix, Dieterle, Thomas, Hummel, Frederic, Fey, Christian, Schmelcher, Peter, Löw, Robert, Pfau, Tilman, Meinert, Florian |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 123, 073003 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.123.073003 |
| Popis: | The level structure of negative-ions near the electron detachment limit dictates the low-energy scattering of an electron with the parent neutral atom. We demonstrate that a single ultracold atom bound inside a Rydberg orbit forming an ultralong-range Rydberg molecule provides an atomic-scale system which is highly sensitive to electron-neutral scattering and thus allows for detailed insights into the underlying near-threshold anion states. Our measurements reveal the so far unobserved fine structure of the $^3P_J$ triplet of Rb$^-$ and allow us to extract parameters of the associated $p$-wave scattering resonances which deviate from previous theoretical estimates. Moreover, we observe a novel alignment mechanism for Rydberg molecules mediated by spin-orbit coupling in the negative ion. Comment: 11 pages, 6 figures |
| Databáze: | arXiv |
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