Details

Autor(en) / Beteiligte

• Engel, F
• Dieterle, T
• Hummel, F
• Fey, C
• Schmelcher, P
• Löw, R
• Pfau, T
• Meinert, F

Titel

Precision Spectroscopy of Negative-Ion Resonances in Ultralong-Range Rydberg Molecules

Ist Teil von

• Physical review letters, 2019-08, Vol.123 (7), p.073003-073003, Article 073003

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

PROLA

Beschreibungen/Notizen

• 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 that 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 ^{3}P_{J} triplet of Rb^{-} and allows us to extract parameters of the associated p-wave scattering resonances that deviate from previous theoretical estimates. Moreover, we observe a novel alignment mechanism for Rydberg molecules mediated by spin-orbit coupling in the negative ion.