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A: Fachverband Atomphysik
A 2: Ultracold Atoms, Ions and Molecules I (with Q)
A 2.7: Vortrag
Montag, 29. Februar 2016, 12:30–12:45, e001
Experimental realization of a single-ion heat eninge — •Kilian Singer1,2, Johannes Rossnagel1,2, Samuel Thomas Dawkins1,2, Ferdinand Schmidt-Kaler1, Georg Jacob1, and Dawid Criwelli1,2 — 1Quantum, Institut für Physik, Universität Mainz, D-55128 Mainz, Germany — 2Experimentalphysik I, Universität Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel, 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 [2].
From direct measurements of the ion dynamics, the thermodynamic cycles for various temperature differences of the reservoirs can be determined [3] and the efficiency compared with analytical estimates.
[1] J. Rossnagel et al., "A single-atom heat engine", arXiv:1510.03681
[2] O. Abah et al., Phys. Rev. Lett. 109, 203006 (2012).
[3] J. Rossnagel et al., New J. Phys. 17, 045004 (2015)