Synchronization Lower Bounds the Efficiency of Near-Degenerate Thermal Machines

TL;DR

This paper explores how quantum synchronization influences the efficiency and power output of a near-degenerate thermal maser, revealing bounds imposed by synchronization measures on thermodynamic performance.

Contribution

It introduces a detailed analysis of the interplay between quantum synchronization and thermodynamic efficiency in a four-level near-degenerate maser, highlighting new bounds related to synchronization.

Findings

Synchronization bounds the coherent heat and efficiency.

Interacting coherences can modify the synchronization-performance relationship.

Synchronization measures impose fundamental limits on thermal machine efficiency.

Abstract

We study the relationship between quantum synchronization and the thermodynamic performance of a four-level near-degenerate extension of the Scovil-Schulz Dubois thermal maser. We show how the existence of interacting coherences can potentially modify the relationship between synchronization and the coherent power output of such a maser. In particular, the cooperation and competition between interacting coherences, causes the coherent heat and efficiency to be bounded by the synchronization measure in addition to the well-studied power synchronization bound. Overall, our results highlight the role of quantum synchronization in the working of a thermal machine.