Diffusion and transfer of entanglement in an array of inductively coupled flux qubits

TL;DR

This paper presents a theoretical method to efficiently generate and transfer multipartite W entangled states in an array of inductively coupled Josephson flux qubits, improving previous protocols by reducing steps needed.

Contribution

It introduces a faster protocol for creating and transferring W entangled states in Josephson flux qubits, enhancing previous methods.

Findings

Faster generation of W states in Josephson qubit arrays.

Protocol enables transfer of W states between rows.

Reduces complexity compared to earlier schemes.

Abstract

A theoretical scheme to generate multipartite entangled states in a Josephson planar-designed architecture is reported. This scheme improves the one published in [Phys. Rev. B 74, 104503 (2006)] since it speeds up the generation of W entangled states in an MxN array of inductively coupled Josephson flux qubits by reducing the number of necessary steps. In addition, the same protocol is shown to be able to transfer the W state from one row to the other.