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DTSTART:20260329T030000
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BEGIN:VEVENT
DTSTAMP:20260513T182220Z
UID:1779872400@ist.ac.at
DTSTART:20260527T110000
DTEND:20260527T120000
DESCRIPTION:Speaker: Xin Wang\nhosted by Julian Leonard\nAbstract:   Abst
 ractAn ultralong-range Rydberg molecule (ULRM) forms optically through the
  interaction between a ground-state atom and the electron of a Rydberg ato
 m. In this talk\, I will present a first and comprehensive experimental an
 d theoretical investigation of ULRMs of 174Yb in 6sns 1S0 Rydberg states a
 cross nearly two decades in principal quantum number and three orders of m
 agnitude in molecular binding energy. Using the Coulomb Green’s function
  formalism\, we compute Born–Oppenheimer molecular potentials describing
  a Rydberg atom perturbed by a ground-state atom and obtain quantitative a
 greement with high-resolution molecular spectra. This enables the extracti
 on of low-energy electron-Yb scattering phase shifts\, including the zero-
 energy s-wave scattering length and the positions of two spin-orbit split 
 p-wave shape resonances. The latter provides strong evidence that the Yb
 − anion exists only as a metastable resonance. We further demonstrate th
 e sensitivity of ULRM spectra to the atomic quantum defects\, enabling a p
 recise determination of the quantum defect of the 6s23f 1F3 state. These f
 indings establish Yb ULRMs as a powerful probe of low-energy electron–Yb
  interactions and an ideal platform for exploring Rydberg molecules and lo
 w-energy scattering physics.
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:Stephanie.Dolot@ist.ac.at
SUMMARY:Xin Wang: Revealing Electron-Ytterbium Interactions through Rydberg
  Molecular Spectroscopy
URL:https://talks-calendar.ista.ac.at/events/6457
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