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Q: Fachverband Quantenoptik und Photonik

Q 28: Poster Quanteninformation

Q 28.5: Poster

Dienstag, 11. März 2008, 16:30–19:00, Poster C2

Techniques minimizing noise in a quantum simulation using trapped Mg ions — •Jan Tibor Glückert — Max-Planck-Institut für Quantenoptik, Garching, Deutschland

Creating a robust experimental setup is a essential task for experiments in the quantum regime e.g. quantum simulation. Disturbing effects before and during a quantum simulation must be minimized in order to reach a suitable fidelity. In a quantum simulation using Mg ions in a linear Paul trap we were confronted with three types of disturbance mainly. Thermal motion of the ions is a handicap for gaining high precision in the most experiments but a knock-out criterion for experiments which require knowledge of the system’s exact motional state. Furthermore the radio-frequency fields used to confine the ions in the trap can lead to periodical motion of the ions (so called micromotion) which can be responsible for further heating effects. The third effect originates in fluctuations of the ion’s energy levels itself. Induced by Zeeman effect these level follow (periodical) disturbance in the applied magnetic fields. We present the impact of these effects on a feasibility study on quantum simulation and techniques to cope with them. Namely, these techniques are first and second sideband cooling to ground state (n<0.05), a procedure minimizing micromotion and a setup reducing magnetic field fluctuation.