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arXiv 1012.4277quant-phcond-mat.mes-hall
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具有非共线Ising相互作用的有限自旋环中的纠缠

Entanglement in finite spin rings with noncollinear Ising interaction

F. Troiani

摘要:

我们研究了有限自旋环的纠缠特性,最近邻环之间存在非共线伊辛相互作用。伊辛轴的方向由环内的自旋位置(模型A)或键的方向(模型B)决定。在这两种情况下,所考虑的自旋哈密顿具有点群对称性,而不是平移不变性,如在自旋环与共线伊辛相互作用。这些模型的基态表现出显着的纠缠特性,类似于GHZ的状态,在没有施加磁场(模型B)。此外,均匀磁场的应用允许定性地修改基态纠缠的特征,从多体量子关联切换到成对量子关联(模型A和B)。

英文摘要:

We investigate the entanglement properties of finite spin rings, with noncollinear Ising interaction between nearest neighbours. The orientations of the Ising axes are determined either by the spin position within the ring (model A) or by the direction of the bond (model B). In both cases, the considered spin Hamiltonians have a point group symmetry, rather than a translation invariance, as in spin rings with collinear Ising interaction. The ground state of these models exhibit remarkable entanglement properties, resembling GHZ-like states in the absence of an applied magnetic field (model B). Besides, the application of an homogeneous magnetic field allows to modify qualitatively the character of the ground state entanglement, switching from multipartite to pairwise quantum correlations (both models A and B).

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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