Freiburg 2019 – scientific programme
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FM: Fall Meeting
FM 58: Quantum Information Concepts in Thermodynamics
FM 58.4: Talk
Wednesday, September 25, 2019, 15:00–15:15, 3042
Collective performance of a finite-time quantum Otto cycle — •Michal Kloc1, Pavel Cejnar2, and Gernot Schaller3 — 1Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland — 2Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Prague, 18000, Czech Republic — 3Institut für Theoretische Physik, Technische Universität Berlin, D-10623 Berlin, Germany
We study the quantum Otto cycle where a collective spin system is used as the working fluid. Starting from a simple one-qubit system we analyze the transition to the limit cycle in the case of a finite-time thermalization. If the system consists of a large sample of independent qubits interacting coherently with the heat bath, the superradiant equilibration is observed. We show that this phenomenon can boost the power of the engine.