Superradiant Many-Qubit Absorption Refrigerator

Cooling fragile quantum systems requires cooling technology. The smallest possible fridge employs a three-level system to autonomously cool the coldest of three reservoirs. authors suggest setup with working fluid composed $N$ collectively coupled qubits effectively implement such refrigerator. collective couplings lead quadratic boost current, $I\ensuremath{\propto}{N}^{2}$.