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摘要翻译：
在热力学极限下，分析了横向磁场中一维XY模型基态的二分态和多分态纠缠。为了探索纠缠与量子相变之间的关系，我们明确地考虑了自发对称性破缺。结果表明，在铁磁相深处，自发对称破缺可以增强二部和多部纠缠，但在临界点附近，只有后者受其影响。这一结果进一步证明，在量子相变中，纠缠是长程关联的基本指标，而不是二分纠缠。
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英文标题：
《Symmetry breaking effects upon bipartite and multipartite entanglement
in the XY model》
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作者：
Thiago R. de Oliveira, Gustavo Rigolin, Marcos C. de Oliveira, E.
Miranda
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Quantum Physics 量子物理学
分类描述：Description coming soon
描述即将到来
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
We analyze the bipartite and multipartite entanglement for the ground state of the one-dimensional XY model in a transverse magnetic field in the thermodynamical limit. We explicitly take into account the spontaneous symmetry breaking in order to explore the relation between entanglement and quantum phase transitions. As a result we show that while both bipartite and multipartite entanglement can be enhanced by spontaneous symmetry breaking deep into the ferromagnetic phase, only the latter is affected by it in the vicinity of the critical point. This result adds to the evidence that multipartite, and not bipartite, entanglement is the fundamental indicator of long range correlations in quantum phase transitions.
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PDF链接：
https://arxiv.org/pdf/709.1956
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