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arXiv quant-ph/0510186quant-phcond-mat.stat-mech
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多维和阻挫自旋模型中的能量和多体纠缠

Energy and multipartite entanglement in multidimensional and frustrated spin models

Otfried Gühne, Geza Toth

摘要:

研究了宏观自旋模型下量子态的纠缠特性与其能量之间的关系。为了这个目的,我们开发了一个通用的方法来计算能量边界的状态没有某些形式的多体纠缠。违反这些界限意味着这些类型的多体纠缠的存在。作为例子,我们研究了不同维的海森堡模型,有磁场存在时的伊辛模型和XX模型。最后,通过研究三角晶格上的海森堡模型,我们证明了我们的技术也可以应用到受挫折的系统。

英文摘要:

We investigate the relation between the entanglement properties of a quantum state and its energy for macroscopic spin models. To this aim, we develop a general method to compute energy bounds for states without certain forms of multipartite entanglement. Violation of these bounds implies the presence of these types of multipartite entanglement. As examples, we investigate the Heisenberg model in different dimensions, the Ising model and the XX model in the presence of a magnetic field. Finally, by studying the Heisenberg model on a triangular lattice, we demonstrate that our techniques can be applied also to frustrated systems.

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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