The generation of a regular dodecahedron graph state with a superconducting qubitnetwork

Abstract

We propose an improved architecture for the physical implementation of two-qubitoperations between arbitrary pairs of qubits by current biasing of coupled Josephsonjunctions. This improvement is necessary for the realization of a functional and scalablequantum computer. The proposed architecture is within the reach of current experimentaltechnology. Secondly, we investigate a simple scheme for generating the graph states via theimproved architecture. Since the controlled-phase gate between arbitrary pairs of qubitscan be implemented easily, we can generate any multi-qubit graph states corresponding tovarious shape graphs, which meet the expectations of various quantum informationprocessing schemes. It is a simple, scalable and feasible scheme for the generation ofvarious graph states based on the current-controlled superconducting charge qubitnetwork.