Erlangen 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 33: Poster Session II

A 33.6: Poster

Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal

Molecular Beam for Quantum Logic Spectroscopy of Single Molecular Ions — •Jan C. Heip¹, Fabian Wolf¹, and Piet O. Schmidt^1,2 — ¹Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — ²IQO, Leibniz Universität, Hannover, Germany

The internal structure of molecules offers rich possibilities for tests of fundamental physics. For example, transitions involving vibrational levels are sensitive to possible variations in the electron-to-proton mass ratio. The additional degrees of freedom (rotational and vibrational) cause obstacles in controlling the quantum states of molecules required for precision spectroscopy. Recent developments in state detection of molecular ions using state-dependent optical dipole forces [1] and state preparation via Raman transitions induced by far-detuned, infrared lasers [2] or frequency combs implements a toolbox which brings high precision optical spectroscopy for molecules within reach. An interesting candidate for a test of possible m_e/m_p variations is ¹⁶O₂⁺ [3]. We are currently setting up a new experimental apparatus consisting of a RF Paul trap and a molecular beam to perform experiments on O₂⁺. A Multi-channel plate equipped with a phosphor screen is used to characterize the spatial and temporal properties of the gas pulses from the molecular beam. First studies on the photo-ionization spectrum of ¹⁶O₂⁺ using a pulsed dye laser are carried out and progress towards quantum logic spectroscopy of these molecular ions will be presented.

[1] Wolf et. al., Nature 530, 457 (2016)

[2] Chou et. al., Nature 545, 203 (2017)

[3] Kajita, Phys. Rev. A 95, 023418 (2017)