Spin Squeezing and Entanglement of Many-Particle Spin-Half States

Chin. Phys. Lett.

2005, Vol. 22

Issue (2): 271-274 DOI:

Original Articles

Spin Squeezing and Entanglement of Many-Particle Spin-Half States

YAN Dong¹;WANG Xiao-Guang²;WU Ling-An³

¹Institute of Applied Physics, Changchun University, Changchun 130022 ²Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, HangZhou 310027 ³Lab of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080

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YAN Dong, WANG Xiao-Guang, WU Ling-An 2005 Chin. Phys. Lett. 22 271-274

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Abstract In many-particle spin-half systems with exchange symmetry, we find that the spin squeezing is related to two types of entanglement, the bipartite and the pairwise entanglement. A quantitative relationship is revealed for the spin squeezing parameter, the tangle, and the concurrence. We find that a class of states is spin squeezed if the pairwise entanglement is stronger than the bipartite entanglement.

Keywords: 03.65.Ud 03.67.-a

Published: 01 February 2005

PACS:	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.-a	(Quantum information)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2005/V22/I2/0271

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