Comment on "Nanoscale Heat Engine Beyond the Carnot Limit"

TL;DR

This paper discusses a thermodynamical formalism that extends the Carnot limit to non-equilibrium baths using a canonical local temperature definition.

Contribution

It introduces a consistent thermodynamical framework that generalizes the Carnot bound to non-equilibrium environments.

Findings

The formalism defines local temperatures in non-equilibrium baths.

It demonstrates the extension of Carnot efficiency beyond equilibrium.

Provides a basis for analyzing heat engines with non-equilibrium reservoirs.

Abstract

There exists a consistent thermodynamical formalism with canonical definition of local temperatures which allows to extend the Carnot bound also to non-equilibrium baths, like those discussed in the Letter