Entanglement in Anisotropic Heisenberg Model with Non-Uniform External Fields

Chin. Phys. Lett.

2005, Vol. 22

Issue (9): 2151-2153 DOI:

Original Articles

Entanglement in Anisotropic Heisenberg Model with Non-Uniform External Fields

WANG Yuan-Feng;CAO Jun-Peng;WANG Yu-Peng

Institute of Physics, Chinese Academy of Sciences, Beijing 100080

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WANG Yuan-Feng, CAO Jun-Peng, WANG Yu-Peng 2005 Chin. Phys. Lett. 22 2151-2153

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Abstract We study entanglement properties of the three-qubit anisotropic Heisenberg model with both uniform and non-uniform external magnetic fields. Analytic expressions for the measures of entanglement at the ground state are obtained. We show that the pairwise entanglement and global entanglement of the system at the ground state clearly depend on the strength and configuration of external fields. The entanglement between some pairs can be enhanced by non-uniform external fields.

Keywords: 03.67.Mn 03.65.Ud 75.10.Jm

Published: 01 September 2005

PACS:	03.67.Mn	(Entanglement measures, witnesses, and other characterizations)
	03.65.Ud	(Entanglement and quantum nonlocality)
	75.10.Jm	(Quantized spin models, including quantum spin frustration)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2005/V22/I9/02151

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