Entanglement properties in (12,1) mixed-spin Heisenberg systems

Zhe Sun, XiaoGuang Wang, AnZi Hu and You-Quan Li

Physica A: Statistical Mechanics and its Applications, 2006, vol. 370, issue 2, 483-500

Abstract: By using the concept of negativity, we investigate entanglement in (12,1) mixed-spin Heisenberg systems. We obtain the analytical results of entanglement in small isotropic Heisenberg clusters with only nearest-neighbor (NN) interactions up to four spins and in the four-spin Heisenberg model with both NN and next-nearest-neighbor (NNN) interactions. For more spins, we numerically study effects of temperature, magnetic fields, and NNN interactions on entanglement. We study in detail the threshold value of the temperature, after which the negativity vanishes.

Keywords: Negativity; Entanglement (search for similar items in EconPapers)
Date: 2006
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:370:y:2006:i:2:p:483-500

DOI: 10.1016/j.physa.2006.03.020

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