Measurement, dissipation, and quantum control with superconducting circuits

The interaction between a superconducting circuit and its environment can cause decoherence. However, environment interactions are necessary for quantum state preparation and measurement. Through the dynamics of open quantum systems, the environment is a resource to control and readout superconducting circuit states. I will present an experimental result demonstrating qubit state stabilization from engineered dissipation with a microwave photonic crystal. In addition, I will discuss measurements of continuous quantum trajectories with a superconducting qubit. These results highlight how interactions at the classical-quantum boundary are an essential aspect of quantum control.