Erlangen 2018 – scientific programme
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A: Fachverband Atomphysik
A 33: Poster Session II
A 33.6: Poster
Wednesday, March 7, 2018, 16:15–18:15, Redoutensaal
Molecular Beam for Quantum Logic Spectroscopy of Single Molecular Ions — •Jan C. Heip1, Fabian Wolf1, and Piet O. Schmidt1,2 — 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 me/mp 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)