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arXiv 0811.3419cond-mat.stat-mech
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阻挫铁磁环中的纠缠和能级交叉

Entanglement and level crossings in frustrated ferromagnetic rings

Masudul Haque, V. Ravi Chandra, Jayendra N. Bandyopadhyay

摘要:

研究了一类介观可调磁系统的纠缠度。该系统是封闭的有限自旋1/2链,铁磁最近邻相互作用受到反铁磁次近邻相互作用的阻碍。有限链显示一系列的水平交叉,反映了相应的无限尺寸链的无公度物理。我们提出了戏剧性的纠缠特征这些不寻常的水平交叉。我们关注的是多自旋和全局纠缠的度量,而不仅仅是单自旋或双自旋纠缠。我们比较和对比从这些措施获得的信息,从传统的凝聚态的措施,如关联函数。

英文摘要:

We study the entanglement content of a class of mesoscopic tunable magnetic systems. The systems are closed finite spin-1/2 chains with ferromagnetic nearest-neighbor interactions frustrated by antiferromagnetic next-nearest-neighbor interactions. The finite chains display a series of level crossings reflecting the incommensurate physics of the corresponding infinite-size chain. We present dramatic entanglement signatures characterizing these unusual level crossings. We focus on multi-spin and global measures of entanglement rather than only one-spin or two-spin entanglements. We compare and contrast the information obtained from these measures to that obtained from traditional condensed matter measures such as correlation functions.

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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