  We report on a device that integrates eight superconducting transmon qubits
in lambda/4 superconducting coplanar waveguide resonators fed from a common
feedline. Using this multiplexing architecture, each resonator and qubit can be
addressed individually thus reducing the required hardware resources and
allowing their individual characterisation by spectroscopic methods. The
measured device parameters agree with the designed values and the resonators
and qubits exhibit excellent coherence properties and strong coupling, with the
qubit relaxation rate dominated by the Purcell effect when brought in resonance
with the resonator. Our analysis shows that the circuit is suitable for
generation of single microwave photons on demand with an efficiency exceeding
80%.
