Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 29: Quantum Effects (Entanglement and Decoherence)

Q 29.7: Vortrag

Mittwoch, 11. März 2020, 12:30–12:45, f442

Speeding up a single ion thermal machine — •Moritz Goeb1, Erik Torrontegui2, Samuel Dawkins1, and Kilian Singer11Experimentalphysik I, University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany — 2Instituto de Fisica Fundamental IFF-CSIC, Calle Serrano 113b, E-28006 Madrid, Spain

We propose speeding up a single ion heat pump based on a tapered ion trap [1]. 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 a novel insight into how speed up can be achieved through the use of inverted harmonic potentials and verify the stability of such trapping conditions [2].

[1]J. Roßnagel, S. T. Dawkins, K. N. Tolazzi, O. Abah, E. Lutz, F. Schmidt-Kaler and K. Singer, Science 352 325 (2016). [2]E. Torrontegui, S. T. Dawkins, M. Göb and K. Singer, New J. Phys. 20, 105001 (2018).

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