Volume 118, Number 4, May 2017
|Number of page(s)||7|
|Published online||26 July 2017|
Energy efficient quantum machines
Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg - D-91058 Erlangen, Germany
(a) Present address: Queen's University Belfast - Belfast, UK;; firstname.lastname@example.org
Received: 14 June 2017
Accepted: 12 July 2017
We investigate the performance of a quantum thermal machine operating in finite time based on shortcut-to-adiabaticity techniques. We compute efficiency and power for a paradigmatic harmonic quantum Otto engine by taking the energetic cost of the shortcut driving explicitly into account. We demonstrate that shortcut-to-adiabaticity machines outperform conventional ones for fast cycles. We further derive generic upper bounds on both quantities, valid for any heat engine cycle, using the notion of quantum speed limit for driven systems. We establish that these quantum bounds are tighter than those stemming from the second law of thermodynamics.
PACS: 05.30.-d – Quantum statistical mechanics / 03.65.-w – Quantum mechanics
© EPLA, 2017
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.