Superconducting quantum circuits can be flexibly engineered using modern thin film and micro/nano-fabrication techniques. These quantum electronic circuits are successfully used to study fundamental quantum effects and develop components for applications in quantum technology. Examples are the tailoring of light-matter interaction, the development of sources and detectors for quantum light, or the implementation of quantum information processing, quantum metrology and quantum simulation systems. Meanwhile, several companies such as Google, IBM or Intel have started the race towards a universal quantum computer based on a superconducting hardware platform.
Superconducting quantum systems can also be successfully coupled to nano-mechanical and magnetic systems. In the resulting hybrid quantum systems different quantum degrees of freedom can be strongly coupled, allowing for the coherent exchange of elementary excitations such as photons, phonons and magnons on a single quantum level. I will give an introduction into the field and address recent advancements in the rapidly growing field of superconducting quantum circuits and technology.