Generation of three-dimensional graph state with Josephson charge qubits

Abstract

On the basis of generations of one-dimensional and two-dimensional graph states, we generate a three-dimensionalN3-qubit graph state based on Josephson charge qubits. Since any two charge qubits can beselectively and effectively coupled by a common inductance, the controlled phase transformbetween any two-qubit states can be performed. Accordingly, we can generate arbitrarymulti-qubit graph states corresponding to arbitrary shape graphs, which meet theexpectations of various quantum information processing schemes. All the devices in thescheme are well within current technology. It is a simple, scalable and feasiblescheme for the generation of various graph states based on Josephson charge qubits.