Driven Spin Systems as Quantum Thermodynamic Machines: Fundamental Limits
Statistical Mechanics
2009-11-13 v1
Abstract
We show that coupled two level systems like qubits studied in quantum information can be used as a thermodynamic machine. At least three qubits or spins are necessary and arranged in a chain. The system is interfaced between two split baths and the working spin in the middle is externally driven. The machine performs Carnot-type cycles and is able to work as heat pump or engine depending on the temperature difference of the baths and the energy differences in the spin system . It can be shown that the efficiency is a function of and .
Cite
@article{arxiv.0705.0075,
title = {Driven Spin Systems as Quantum Thermodynamic Machines: Fundamental Limits},
author = {M. J. Henrich and M. Michel and G. Mahler},
journal= {arXiv preprint arXiv:0705.0075},
year = {2009}
}