Multipartite Entanglement Generation Assisted by Inhomogeneous Coupling

TL;DR

This paper proposes a method to generate multipartite entanglement efficiently by controlling inhomogeneous coupling between qubits and a data bus, utilizing resonant and dispersive interactions to access specific entangled states.

Contribution

It introduces a novel approach combining engineered inhomogeneous coupling with resonant and dispersive interactions for entanglement generation.

Findings

Fast multipartite entanglement generation demonstrated.

Controlled access to symmetric Hilbert space achieved.

Engineering of coupling strengths enables targeted entangled states.

Abstract

We show that controllable inhomogeneous coupling between two-level systems and a common data bus provides a fast mechanism to produce multipartite entanglement. Our proposal combines resonant interactions and engineering of coupling strengths---between the qubits and the single mode---leading to well defined entangled states. Furthermore, we show that, if the two-level systems interact dispersively with the quantized mode, engineering of coupling strengths allows the controlled access of the symmetric Hilbert space of qubits.