Josephson Phase Qubit with a Distributed Reactance

We present our characterization of a novel phase qubit design in which the capacitance across the Josephson junction and the inductance of the SQUID are provided by a microstrip resonator instead of lumped circuit elements. The spectroscopic data from this device clearly shows a behavior with respect to applied flux that cannot be accurately described by a simple SQUID model. We present measurements of the devices coherence times and anharmonicity, and compare the spectrum to a theoretical model that treats the phase drop across the length of the resonator as a continuous field.