Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 19: Quantum Optics III
Q 19.2: Vortrag
Dienstag, 7. März 2017, 11:15–11:30, P 5
Ion traps as heat pumps — •Dawid Crivelli1, Samuel Thomas Dawkins1, Ferdinand Schmidt-Kaler2, and Kilian Singer1 — 1Experimentalphysik I, Universität Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany — 2Quantum, Institut für Physik, Universität Mainz, D-55128 Mainz, 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.
A single ion can be driven against the tapered potential, compressing the radial degrees of freedom, which can be then used as a thermal medium. By performing work on the ion, heat is transported from a cold to a hot end of an engineered bath.
Extending the system to multiple ions, the external work induces a directional transfer of heat through the linear crystal. Ions at one side of the trap thus model a finite bath being cooled below its initial, Doppler limited, temperature.
[1] J. Rossnagel et al., "A single-atom heat engine", Science, Vol. 352, Issue 6283, pp. 325-329