Broadcasting of continuous variable entanglement

TL;DR

This paper proposes a method for broadcasting continuous variable entanglement using local linear amplifiers and beam splitters, enabling the distribution of entanglement between distant parties with high fidelity.

Contribution

It introduces a novel protocol for broadcasting continuous variable entanglement with practical implementation details and fidelity analysis.

Findings

Broadcasting of entanglement is feasible with the proposed scheme.

The protocol works for various input squeezed states.

Fidelity of output states depends on amplifier phases and input states.

Abstract

We present a scheme for broadcasting of continuous variable entanglement. We show how an initial two-mode squeezed state of the electromagnetic field shared by two distant parties can be broadcasted into two nonlocal bipartite entangled states. Our protocol uses a local linear amplifier and a beam splitter at each end. We compute the fidelity of the output entangled states and show that the broadcasting can be implemented for a variety of input squeezed states and amplifier phases.