SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.1: Poster
Thursday, March 9, 2023, 16:30–19:00, Empore Lichthof
State-dependent force spectroscopy for trapped ions — •Stefan Walser, Zhenlin Wu, René Nardi, Guanqun Mu, Brandon Furey, and Philipp Schindler — Institut für Experimentalphysik, Universität Innsbruck, Austria
Optical trapping and laser cooling are techniques that founded a revolution of quantum experiments in which atoms and molecules are manipulated using optical forces induced by laser light. A particularly useful technique are optical tweezers which are routinely used in many scientific disciplines. Certain trapped ions are an excellent basis for high precision spectroscopic experiments due to the available electronic structure for state preparation and read-out at the single atom level. Within this project we aim to combine state-dependent optical tweezers to manipulate the motional modes of an ion crystal with quantum logic spectroscopy. We plan to co-trap a well controllable 40Ca+ logic ion with a molecular ion of interest which is inaccessible to the standard spectroscopic techniques in ion traps. Applying a state-dependent force on the molecular ion using an optical tweezer, the overall trapping potential is modified. This consequently changes the frequency of the ion’s common motional mode. That frequency shift can be measured via the logic ion. Thereby we realize a quantum non-demolition measurement of the molecule’s internal vibrational and rotational states. We hope that this project will facilitate the non-destructive state detection of molecules with the outlook of providing a basis for a compact spectrometer for atomic and molecular systems.