Broadcasting of Entanglement in Three-Particle Greenberger-Horne-Zeilinger State via Quantum Copying

Chin. Phys. Lett.

2000, Vol. 17

Issue (7): 469-471 DOI:

Original Articles

Broadcasting of Entanglement in Three-Particle Greenberger-Horne-Zeilinger State via Quantum Copying

TONG Zhao-Yang;KUANG Le-Man

Department of Physics, Hu nan Normal University, Changsha 410081

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TONG Zhao-Yang, KUANG Le-Man 2000 Chin. Phys. Lett. 17 469-471

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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 the three-particle Greenberger-Horne-Zeilinger (GHZ) state. The results show that the entanglement of the 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.

Keywords: 03.75.Fi 03.65.Bz 32.80.Pj 74.20.De

Published: 01 July 2000

PACS:	03.75.Fi
	03.65.Bz
	32.80.Pj
	74.20.De	(Phenomenological theories (two-fluid, Ginzburg-Landau, etc.))

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2000/V17/I7/0469

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