Quantum state transfer and controlled-phase gate on 1D superconducting resonators assisted by a quantum bus

We propose a quantum processor for the scalable quantum computation based on microwave photons in 1D superconducting resonators. Different from the previous processors which are composed of some resonators coupled to a superconducting qubit, our processor is composed of some resonators ri and a common resonator R acting as a quantum bus, which makes it have the capability of integrating more resonators simply by coupling them to the bus R in different positions. R is coupled to only one transmon qutrit, and the coupling strengths between ri and R can be fully tuned. To show the processor can be used to achieve universal quantum computation effectively, we present a scheme to complete the high-fidelity quantum state transfer between two microwave-photon resonators and another one for the high-fidelity controlled-phase gate on them.