Generation of 3-Dimensional graph state with Josephson charge qubits

TL;DR

This paper presents a scalable and feasible scheme to generate 3D graph states using Josephson charge qubits, enabling advanced quantum information processing with current technology.

Contribution

It introduces a method to generate arbitrary multi-qubit graph states, including 3D states, with selective coupling of charge qubits using Josephson junctions.

Findings

Successful generation of 3D graph states with Josephson charge qubits

The scheme is simple, scalable, and compatible with current technology

Allows for arbitrary shape graph states for quantum information processing

Abstract

On the basis of generations of 1-dimensional and 2-dimensional graph states, we generate a 3-dimensional N3-qubit graph state based on the Josephson charge qubits. Since any two charge qubits can be selectively and effectively coupled by a common inductance, the controlled phase transform between any two-qubit can be performed. Accordingly, we can generate arbitrary multi-qubit graph states corresponding to arbitrary shape graph, which meet the expectations of various quantum information processing schemes. All the devices in the scheme are well within the current technology. It is a simple, scalable and feasible scheme for the generation of various graph states based on the Josephson charge qubits.