Separable states to distribute entanglement

TL;DR

This paper explores how certain three-qubit separable states can be used to distribute entanglement between two particles, identifying the maximum entanglement achievable through this method.

Contribution

It investigates a specific class of three-qubit separable states and quantifies the maximum entanglement that can be distributed between two particles.

Findings

Identified a class of three-qubit separable states suitable for entanglement distribution.

Calculated the maximal entanglement achievable between two particles after distribution.

Extended understanding of entanglement sharing via separable states.

Abstract

It was shown that two distant particles can be entangled by sending a third particle never entangled with the other two [T. S. Cubitt et al., Phys. Rev. Lett. 91, 037902 (2003)]. In this paper, we investigate a class of three-qubit separable states to distribute entanglement by the same way, and calculate the maximal amount of entanglement which two particles of separable states in the class can have after applying the way.