Hannover 2016 – scientific programme
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A: Fachverband Atomphysik
A 6: Ultracold Atoms, Ions and Molecules II (with Q)
A 6.8: Talk
Monday, February 29, 2016, 16:15–16:30, e001
Non-destructive rotational state detection for molecular ions — •Fabian Wolf1, Yong Wan1, Jan C. Heip1, Florian Gebert1, Chunyan Shi1, and Piet O. Schmidt1,2 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Leibniz Universität Hannover, Germany
High precision spectroscopy of molecular ions is a promising tool for the investigation of fundamental physics, e.g. the search for variation of fundamental constants, an electron electric dipole moment or parity violation in chiral molecules. However, the practictal implementation has remained illusive due to the lack of efficient state preparation and detection schemes. Here, we present the first demonstration of a non-destructive rotational state detection for a single molecular ion trapped in a linear Paul trap [1]. For this purpose, we implement a quantum logic operation between the molecular 24MgH+ ion and a co-trapped atomic 25Mg+ logic ion.
The experimental sequence consists of sympathetic ground state cooling with the logic ion [2] and a state dependent optical dipole force that transfers the molecule’s internal state to the shared state of motion. Afterwards, the motional state is mapped onto the atomic qubit state, that can be detected efficiently by state dependent fluorescence. We use this technique to perform a variant of quantum logic spectroscopy on a molecular transition.
[1] Wolf et al. arXiv:1507.07511 (2015)
[2] Wan et al. Phys. Rev. A 91, 043425 (2015)