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Entanglement in a Quantum Mixed-Spin
Hao Xiang,Zhu Shiqun *
School of Physical Science and Technology， Suzhou University
*Correspondence author
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Funding: 教育部博士点基金（No.20050285002）
Opened online:21 April 2006
Accepted by: none
Citation: Hao Xiang,Zhu Shiqun.Entanglement in a Quantum Mixed-Spin[OL]. [21 April 2006] http://en.paper.edu.cn/en_releasepaper/content/6339
 
 
The entanglement in a general mixed spin chain with arbitrary spin $S$ and $1/2$ is investigated in the thermodynamical limit. The entanglement is witnessed by the magnetic susceptibility which decides a characteristic temperature for an entangled thermal state. The characteristic temperature is nearly proportional to the interaction $J$ and the mixed spin $S$. The bound of negativity is obtained on the basis of the magnetic susceptibility. It is found that the macroscopic magnetic properties are affected by the quantum entanglement in the real solids. Meanwhile, the entanglement can be quantitatively evaluated by the thermodynamical observable.
Keywords:entanglement, susceptibility, characteristic temperature
 
 
 

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