Friction-free quantum machines
Adolfo del Campo, Aur\'elia Chenu, Shujin Deng, Haibin Wu
TL;DR
This paper demonstrates how shortcuts to adiabaticity can be used to design quantum heat engines that operate at maximum efficiency with tunable power, overcoming traditional efficiency-power trade-offs.
Contribution
It introduces a scalable superadiabatic quantum Otto cycle and explores quantum friction control, showing performance improvements with many-particle working media.
Findings
Successful implementation of superadiabatic quantum Otto cycle.
Quantum friction can be tailored to improve machine performance.
Many-particle systems outperform single-particle machines in this context.
Abstract
The operation of a quantum heat engine in finite time generally faces a trade-off between efficiency and power. Using shortcuts to adiabaticity (STA), this trade off can be avoided to engineer thermal machines that operate at maximum efficiency and tunable output power. We demonstrate the use of STA to engineer a scalable superadiabatic quantum Otto cycle and report recent experimental progress to tailor quantum friction in finite-time quantum thermodynamics. In the presence of quantum friction, it is also shown that the use of a many-particle working medium can boost the performance of the quantum machines with respect to an ensemble of single-particle thermal machines.
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