Superconducting electric circuits for future technologies

Abstract: Superconductivity was discovered a century ago and yet has found its way to many technological applications ranging from brain imaging to studies of the cosmic microwave background. However, the most revolutionary applications are at the horizon and will be provided by the rise of quantum technology. For example, the superconducting quantum computer has great potential to become a useful computational device. I will discuss the recent developments of the Quantum Computing and Devices group at Aalto University in this field. Namely, I will present a nanobolometer with an order of magnitude lower noise compared with the present state of the art. Furthermore, I present a quantum-circuit refrigerator that can be used to directly cool down superconducting electric circuits at will. Finally, I show our plans in improving and applying the bolometer and the refrigerator. Importantly, we plan to build a superconducting quantum computer with integrated cooling elements for fast and accurate qubit initialization.