"Precision Spectroscopy in few-body Atoms and Molecules" (Prof. Frédéric Merkt)

  • Datum: 16.04.2024
  • Uhrzeit: 14:30
  • Vortragende(r): Prof. Frédéric Merkt
  • ETH Zürich
  • Ort: Max Planck Institute of Quantum Optics
  • Raum: Herbert Walther Lecture Hall
Precision measurements of the Rydberg spectra of H, He and H2 will be presented, which aim at determining their ionization energies and, in the case of H2, also the spin-rovibrational energy-level structure of H2+. These measurements are carried out for comparison with the results of first-principles calculations that include the treatment of finite-nuclear-size effects and relativistic and quantum-electrodynamics corrections up to high order in the fine-structure constant.

The talk will describe our experimental strategy to overcome limitations originating from the Doppler effect, the Stark effect, and the laser-frequency calibration. New results will be presented on all three systems, including a new determination of the Rydberg constant and a new method to record Doppler-free single-photon excitation spectra of Rydberg states.

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