# Quantized refrigerator for an atomic cloud

## TL;DR

This paper proposes a quantum thermal machine using atomic mixtures to refrigerate large bosonic clouds, exploring its operation within the quantum Otto cycle and its implications for quantum thermodynamics.

## Contribution

It introduces a novel atomic setup for quantum refrigeration and analyzes its operation and limitations within the framework of quantum thermodynamics.

## Key findings

- Feasible implementation of atomic quantum refrigerator.
- Operation within the quantum Otto cycle regime.
- Potential for studying fundamental quantum thermodynamics questions.

## Abstract

We propose to implement a quantized thermal machine based on a mixture of two atomic species. One atomic species implements the working medium and the other implements two (cold and hot) baths. We show that such a setup can be employed for the refrigeration of a large bosonic cloud starting above and ending below the condensation threshold. We analyze its operation in a regime conforming to the quantized Otto cycle and discuss the prospects for continuous-cycle operation, addressing the experimental as well as theoretical limitations. Beyond its applicative significance, this setup has a potential for the study of fundamental questions of quantum thermodynamics.