We present a theoretical study of an electronic quantum refrigerator based on four quantum dots arranged in a square configuration, in contact with as many thermal reservoirs. We show that the system implements the basic minimal mechanism for acting as a self-contained quantum refrigerator, by demonstrating heat extraction from the coldest reservoir and the cooling of the nearby quantum-dot.
@article{arxiv.1210.3649,
title = {Minimal Self-Contained Quantum Refrigeration Machine Based on Four Quantum Dots},
author = {Davide Venturelli and Rosario Fazio and Vittorio Giovannetti},
journal= {arXiv preprint arXiv:1210.3649},
year = {2013}
}