Attaining Carnot Efficiency with Quantum and Nanoscale Heat Engines
Abstract
A heat engine operating in the oneshot finitesize regime, where systems composed of a small number of quantum particles interact with hot and cold baths and are restricted to oneshot measurements, delivers fluctuating work. Further, engines with lesser fluctuation produce a lesser amount of deterministic work. Hence, the heattowork conversion efficiency stays well below the Carnot efficiency. Here we overcome this limitation and attain Carnot efficiency in the oneshot finitesize regime, where the engines allow the working systems to simultaneously interact with two baths via the semilocal thermal operations and reversibly operate in a onestep cycle. These engines are superior to the ones considered earlier in work extraction efficiency, and, even, are capable of converting heat into work by exclusively utilizing intersystem correlations. We formulate a resource theory for quantum heat engines to prove the results.
 Publication:

arXiv eprints
 Pub Date:
 November 2019
 DOI:
 10.48550/arXiv.1911.07003
 arXiv:
 arXiv:1911.07003
 Bibcode:
 2019arXiv191107003L
 Keywords:

 Quantum Physics;
 Condensed Matter  Mesoscale and Nanoscale Physics;
 Condensed Matter  Statistical Mechanics;
 Mathematical Physics;
 Physics  Atomic Physics
 EPrint:
 Accepted for publication in npj Quantum Information (2021)