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arXiv quant-ph/0605063quant-ph
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量子混合自旋链中的纠缠

Entanglement in a Quantum Mixed-Spin Chain

Xiang Hao, Shiqun Zhu

摘要:

研究了一般混合自旋链中任意自旋$S$和1/2自旋的纠缠。磁化率决定了纠缠热态的特征温度,证明了纠缠的存在。特征温度几乎与相互作用$J$和混合自旋$S$成正比。在磁化率的基础上得到了负性的界。研究发现,实际固体中的量子纠缠对宏观磁性有很大的影响。同时,纠缠度可以用物理可观测量来定量评价。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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