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Thermal entanglement of spins in mean-field clusters

Asoudeh, M ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevA.73.062109
  3. Publisher: 2006
  4. Abstract:
  5. 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. © 2006 The American Physical Society
  6. Keywords:
  7. Antiferromagnetism ; Ferromagnetism ; Magnetic anisotropy ; Thermal effects ; Anisotropic Heisenberg interaction ; Ferromagnetic cluster ; Mean-field clusters ; Xxx cluster ; Magnetic field effects
  8. Source: Physical Review A - Atomic, Molecular, and Optical Physics ; Volume 73, Issue 6 , 2006 ; 10502947 (ISSN)
  9. URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.73.062109