Propagating quantum microwave photonics. Transmon qubit in a broadband on-chip environment

Superconducting circuits have become a key platform in the field of quantum technology. This work contributes to the field of microwave quantum photonics by scattering experiments of microwave photons. Thus, it is closely related to the concepts of generation, routing, manipulation, and detection of propagating quantum states. We study the scattering of an incident microwave field off an artificial atom in a broadband engineered, open environment. We confirm that the noise in our system can be described by a combination of the spin boson model and the Ornstein-Uhlenbeck approach.