Circuit QED with superconducting qubits --- a multi-pole approach

Circuit quantum electrodynamics --- superconducting Josephson junction ``transmon'' qubits coupled via microwave cavities --- is a promising route towards scalable quantum computing. Here we report on experiments coupling two transmon qubits through multiple strongly coupled planar superconducting cavities --- the multi-pole cavity QED architecture. The main feature of this architecture is that the on/off ratio is expected to scale exponentially in the number of cavities (poles). In this talk we will discuss our gate protocol --- the adiabatic multi-pole (AMP) gate --- and report on producing a high fidelity Bell state ($|gg\rangle+|ee\rangle$) measured from state and process tomography. We will also report on measurements of the off-resonant coupling rate. Finally, we will discuss future plans for scaling this architecture beyond two qubits and our progress towards implementing multi-pole QED with flux insensitive qubits in 3D microwave cavities.