Bonn 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
QI: Fachverband Quanteninformation
QI 38: Quantum Thermodynamics
QI 38.3: Vortrag
Freitag, 14. März 2025, 11:30–11:45, HS IX
An autonomous engine converting particle-exchange to mechanical motion — •Sofia Sevitz1, Federico Cerisola2, and Janet Anders1,2 — 1University of Potsdam, Institute of Physics and Astronomy, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany — 2Physics and Astronomy, University of Exeter, Exeter EX4 4QL, United Kingdom
We study the platform consisting of a quantum dot coupled to a mechanical resonator. By coupling the dot (medium of the particle-exchange engine) to the resonator (work load), the produced work is stored in the displacement (which functions as a battery) and can be directly measured. We develop a thermodynamics framework to quantify heat and particle flows between system and reservoirs. In this way, we are able to estimate the mechanical energy stored in the displacement of the resonator. By computing the Husimi distribution we show that as the energy transfer increases, the state of the resonator approaches a coherent state, resulting in the emergence of measurable self-sustained oscillations. The device considered here provides a promising platform for the study of work extraction and storage in the nanoscale with experimentally feasible capabilities.
Keywords: Quantum dot; Autonomous engine; Particle-exchange engine; Electromechanical coupling; Quantum transport