Engineering Robust Superconducting Qubits

The coherence times of superconducting qubits have advanced dramatically within the last few years. ~This has been primarily achieved by improving the microwave environment and reducing materials loss. ~Though the qubit parameters have changed significantly over the years, the qubit circuit has remained in the form of a LCJ circuit (flux,charge, and phase qubits). ~Recently, more sophisticated circuits, such as the 0-pi circuit proposed by Brooks et al.[1] offer the possibility of enhanced protection from dephasing and relaxation. In this talk, we will discuss the implementation of such circuits with realizable parameters, and present preliminary experimental results. [1] Brooks et al. PRA 87, 052306 (2013)