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Q: Fachverband Quantenoptik und Photonik
Q 62: Ultra-cold atoms, ions and BEC (joint session A/Q)
Q 62.3: Poster
Thursday, March 17, 2022, 16:30–18:30, P
Optically trapping single ions in a high-focused laser beam — •Wei Wu1, Fabian Thielemann1, Joachim Welz1, Pascal Weckesser1,2, Daniel Hönig1, Amir Mohammadi1, Thomas Walker1, and Tobias Schätz1 — 1Albert-Ludwigs-Universität Freiburg, Physikalisches Institut, Hermann-Herder-Straße 3, 79104 Freiburg, Germany — 2Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
Ions stored in Paul traps are well suited to design few-particle systems with high-fidelity control over electronic and motional degrees of freedom and individual addressability., alongside long-range interactions. It is challenging, however, to extend this control to two- or higher-dimensional systems. This is partly due to the existence of driven motion, which intrinsically leads to decoherence and heating. Ions confined in optical traps, on the other hand, constitute a system which is free of driven motion but still benefits from long-range interaction. For example, ions in optical traps could be used to study and control quantum structural phase transitions from 1D (linear) to 2D (zigzag) crystals. Additionally, optical traps offer scalability, flexibility and nanoscale potential geometries which are not easily accessible with Paul traps. Optical traps for ions also feature state-dependent trapping due to the different potentials seen by the ion when in different electronic states. In this poster, we present a method to deterministically prepare a single ion or string of ions, making use of state dependent potentials in optical traps to eject selected ions from the trap.