Universal two-level quantum Otto machine under a squeezed reservoir

TL;DR

This paper introduces a universal two-level quantum Otto machine interacting with thermal and squeezed reservoirs, capable of producing work or cooling, with performance analyzed in finite-time regimes for practical relevance.

Contribution

It presents a novel quantum Otto engine model that operates with a squeezed reservoir and adjustable parameters, enabling versatile thermodynamic functions.

Findings

The machine can produce net work or act as a refrigerator depending on parameters.

Performance is optimized in finite-time operation regimes.

The model demonstrates practical feasibility of quantum heat machines with squeezed reservoirs.

Abstract

We study an Otto heat machine whose working substance is a single two-level system interacting with a cold thermal reservoir and with a squeezed hot thermal reservoir. By adjusting the squeezing or the adiabaticity parameter (the probability of transition) we show that our two-level system can function as a universal heat machine, either producing net work by consuming heat or consuming work that is used to cool or heat environments. Using our model we study the performance of these machine in the finite-time regime of the isentropic strokes, which is a regime that contributes to make them useful from a practical point of view.