Nested entangled states for distributed quantum channels

TL;DR

This paper proposes a method to generate multiple Bell states in a spin chain for distributed quantum communication, enabling efficient entanglement distribution with minimal control, applicable in coupled cavity systems.

Contribution

It introduces a specific coupling configuration for spin chains to produce multiple Bell states simultaneously, facilitating distributed quantum channels with minimal control.

Findings

Identified a coupling-strength configuration for N-spin chains to generate Bell states.

Proposed a minimal-control scheme for distributing entanglement across remote locations.

Applicable in chains of coupled cavities with three-level atoms.

Abstract

We find a coupling-strength configuration for a linear chain of N spins which gives rise to simultaneous multiple Bell states. We suggest a way such an interesting entanglement pattern can be used in order to distribute maximally entangled channels to remote locations and generate multipartite entanglement with a minimum-control approach. Our proposal thus provides a way to achieve the core resources in distributed information processing. The schemes we describe can be efficiently tested in chains of coupled cavities interacting with three-level atoms.