SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 13: Ultra-cold Atoms, Ions and BEC I (joint session A/Q)
Q 13.7: Vortrag
Montag, 6. März 2023, 18:45–19:00, F303
Simulation of sympathetic cooling in a linear paul trap driven by alternative waveforms — •Paul Oskar Sund1, Martin Kernbach1,2, and Andreas W. Schell1,2 — 1Leibniz Universität, Hannover, Deutschland — 2Physikalisch-Technische Bundesanstalt, Braunschweig, Deutschland
Linear quadrupole ion traps have been established as a versatile platform for quantum computing and atomic clocks, since they allow for an environment-isolated manipulation of multiple ions simultaneously combined with flexible optical access. However, the preparation of ion species by sympathetic cooling at room-temperature demands up to several minutes, while encountering rf-heating and scattering losses. In general, the particles dynamic is determined by the ponderomotive trap force resulting from the periodical oscillating electrical field, which is dependent on the applied waveform.
Therefore the ongoing cooling dynamics were investigated by numerically solving the Mathieu's differential equations of motion in a two-particle sympathetic cooling model under various driving waveforms and initial conditions. The simulation reveals differences in rf-heating, cooling speed and steady state energies at Coulomb-crystallization. Furthermore, shifted stability regions compared to the harmonic trap driving are found. Based on these results a further systematic investigation with alternative driving waveforms appears to be promising for improving the trapping stability and preparation times.