Berlin 2024 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 6: Trapped Ion and Atom Qubits
QI 6.1: Hauptvortrag
Montag, 18. März 2024, 15:00–15:30, HFT-FT 131
Heat engine and force sensing with trapped ions — •Kilian Singer1, Bo Deng1, Moritz Göb1, Max Masuhr2, and Daqing Wang2 — 1Institute of Physics, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany — 2Institut für Angewandte Physik, University of Bonn, Wegelerstr. 8, 53115 Bonn, Germany
Thermodynamic machines can be reduced to the ultimate atomic limit [1], using a single ion as a working agent. The confinement in a linear Paul trap with tapered geometry allows for coupling axial and radial modes of oscillation. The heat-engine is driven thermally by coupling it alternately to hot and cold reservoirs, using the output power of the engine to drive a harmonic oscillation. From direct measurements of the ion dynamics, the thermodynamic cycles for various temperature differences of the reservoirs can be determined and the efficiency compared with analytical estimates. I will describe how the engine principle can be exploited to implement a differential probe for non-classical baths [2] and to amplify zeptonewton forces [3] using non-linear features of the tapered trap design.
[1] J. Rossnagel et al., "A single-atom heat engine", Science 352, 325 (2016).
[2] A. Levy, M. Göb, B. Deng, K. Singer, E. Torrontegui and D.Wang "Single-atom heat engine as a sensitive thermal probe." New Journal of Physics, 22, 093020 (2020).
[3] B. Deng, M. Göb, B. Stickler, M. Masuhr, K. Singer, and D. Wang Phys. Rev. Lett. 131, 153601 (2023).
Keywords: heat engine; trapped ion; force sensing; thermodynamics; quantum