Thermal entanglement of spins in mean-field clusters

被引：17

作者：

Asoudeh, M. ^{[1
]}

Karimipour, V. ^{[1
]}

机构：

[1] Sharif Univ Technol, Dept Phys, Tehran, Iran

来源：

PHYSICAL REVIEW A | 2006年 / 73卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.73.062109

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We determine thermal entanglement in mean-field clusters of N spin one-half particles interacting via the anisotropic Heisenberg interaction, with and without external magnetic field. For the xxx cluster in the absence of magnetic field we prove that only the N=2 ferromagnetic cluster shows entanglement. An external magnetic field B can only entangle xxx antiferromagnetic clusters in certain regions of the B-T plane. On the other hand, the xxz clusters of size N > 2 are entangled only when the interaction is ferromagnetic. Detailed dependence of the entanglement on various parameters is investigated in each case.

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页数：8

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