Refrigeration by modified Otto cycles and modified swaps through generalized measurements

TL;DR

This paper proposes two novel quantum refrigeration cycles based on modified Otto cycles using generalized measurements, demonstrating enhanced performance and introducing measurement-induced autonomous refrigeration.

Contribution

It introduces measurement-based modifications to Otto and swap refrigerators, revealing performance improvements and autonomous operation driven by quantum measurements.

Findings

First type refrigerator's COP increases linearly with measurement strength.

Second type acts as an autonomous refrigerator powered by a measurement-induced quantum engine.

Modified swap refrigerators share thermodynamic properties with the Otto cycle modifications.

Abstract

We introduce two types of thermodynamic refrigeration cycles obtained through modification of the Otto cycle refrigerator by a generalized measurement channel. These refrigerators are corresponding to the activation of the measurement-based stroke before (first type) and after (second type) the full thermalization of the cooling medium by the cold reservoir in the related familiar Otto cycle. We show that the coefficient of performance for the first type modified refrigerator increases linearly in terms of measurement strength parameter, beyond the classical cooling of the known Otto cycle refrigerator. The second type interestingly introduces another autonomous refrigerator whose supplying work is provided by a quantum engine induced by the measurement channel along the modified cycle. By the considered measurement channel, we also establish such modifications on the swap refrigerator. It is observed that the thermodynamic properties of the obtained modified swap refrigerators are the same as of the modified Otto cycle ones respectively.