Broadcasting of entanglement in three-particle GHZ state via quantum copying

Abstract

We introduce entanglement measures to describe entanglement in a three-particle system and apply it to studying broadcasting of entanglement in three-particle GHZ state. We show that entanglement of three-qubit GHZ state can be partially broadcasted with the help of local or non-local copying processes. It is found that non-local cloning is much more efficient than local cloning for the broadcasting of entanglement.

9 pages, to appear in Chin. Phys. Lett. (2000)

References in corpus (6)

• Experimental quantum teleportation
• Observation of three-photon Greenberger-Horne-Zeilinger entanglement
• A Multiparticle Generalization of Entanglement Swapping
• Optimal Universal and State-Dependent Quantum Cloning
• Optimal Cloning of Pure States
• On Multipartite Pure-State Entanglement

Cited by in corpus (2)

• Optimal classical-communication-assisted local model of n-qubit Greenberger-Horne-Zeilinger correlations
• Local deterministic simulation of equatorial Von Neumann measurements on tripartite GHZ state