Quantum Focus series, session 3 of 3—In this webinar, we will illustrate an autonomous quantum refrigerator that can reset computational qubits in a superconducting-qubit quantum computer. In a proof-of-principle experiment, the refrigerator cooled an initially excited qubit to approximately 22 mK, lower than the temperatures achieved by some state-of-the-art reset protocols. Also, we will propose criteria for building useful autonomous quantum machines, inspired by DiVincenzo’s for useful quantum computers.