Superradiant many-qubit absorption refrigerator

TL;DR

This paper demonstrates that a large-spin network with collective interactions can function as a quantum absorption refrigerator, with efficiency and noise scaling quadratically with the number of spins, indicating potential for scalable quantum cooling devices.

Contribution

It introduces a model of a quantum absorption refrigerator using a large-spin network with collective anti-ferromagnetic interactions and reservoirs, highlighting quadratic scaling of performance.

Findings

Steady-state cooling current scales quadratically with the number of spins

Noise and entropy production rate also scale quadratically

The system can operate effectively as a quantum refrigerator in certain regimes

Abstract

We show that the lower levels of a large-spin network with a collective anti-ferromagnetic interaction and collective couplings to three reservoirs may function as a quantum absorption refrigerator. In appropriate regimes, the steady-state cooling current of this refrigerator scales quadratically with the size of the working medium, i.e., the number of spins. The same scaling is observed for the noise and the entropy production rate.