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

Zhao-Yang Tong·Le-Man Kuang
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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.

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Zhao-Yang Tong, Le-Man Kuang. 2000-05-17. Broadcasting of entanglement in three-particle GHZ state via quantum copying. https://doi.org/10.1088/0256-307x%2F17%2F7%2F001

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