Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster: Quantum Optics and Photonics II

Q 41.44: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik

Transient Non-Confining Potentials for Speeding Up a Single Ion Heat Pump — Erik Torrontegui¹, Samuel Dawkins², •Moritz Göb², and Kilian Singer² — ¹Instituto de Física Fundamental IFF-CSIC, Calle Serrano 113b, 28006 Madrid, Spain — ²Experimentalphysik I, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

We propose speeding up a single ion heat pump based on a tapered ion trap. If a trapped ion is excited in an oscillatory motion axially the radial degrees of freedom are cyclically expanded and compressed such that heat can be pumped between two reservoirs coupled to the ion at the turning points of oscillation. Through the use of invariant-based inverse engineering we can speed up the process without sacrificing the efficiency of each heat pump cycle. This additional control can be supplied with additional control electrodes or it can be encoded into the geometry of the radial trapping electrodes. We present novel insight how speed up only limited by the magnitude of the control voltage can be achieved through the use of inverted harmonic potentials. We have verified that stable trapping conditions can be achieved.