Shortcuts to adiabaticity in many-body quantum heat engines

Zapraszamy w piątek 25.10.2019 o godz. 12:15, sala 361 na seminarium.

Wykład pod tytułem: "Shortcuts to adiabaticity in many-body quantum heat engines" poprowadzi Andreas Hartmann  (Institute for Theoretical Physics, University of Innsbruck - Quantum optimization group).

Abstract: Quantum thermodynamics concerns the realisation thermodynamic cycles in quantum many-body systems. Due to the requirement of adiabaticity, a major challenge is to yield a non-vanishing power output or cooling power at finte times, respectively. One possibility available for coherent quantum strokes is to implement shortcuts to adiabaticity (STAs) to speed-up such, otherwise infinitely-long, cycles. Here we investigate the applicability of local approximate counter-diabatic protocols on many-body quantum heat engines (QHEs) where the working medium of our QHE is a many-body spin system. The counter-diabatically driven Otto cycle in this work shows a considerable increase in efficiency and power output compared to the adiabatic Otto cycle.