摘要翻译:
我们研究了空间非均匀环境中强相互作用费米子的纠缠。为了量化存在空间非均匀性时的纠缠,我们提出了一种纠缠熵的局域密度近似(LDA)和一种嵌套的LDA方案来计算非均匀密度分布上的纠缠熵。这些思想被应用于不同调制模式的超晶格结构中的电子模型、存在杂质的金属丝中的电子模型以及谐波约束多费米子系统中的相分离态模型,如量子点中的电子和光学陷阱中的原子。我们发现非均匀系统的纠缠熵与均匀系统的纠缠熵有显著的不同。
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英文标题:
《Entanglement in spatially inhomogeneous many-fermion systems》
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作者:
V. V. Fran\c{c}a and K. Capelle
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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:Strongly Correlated Electrons 强关联电子
分类描述:Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学,非费米液体,自旋液体,量子临界性,电荷密度波,金属-绝缘体跃迁
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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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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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英文摘要:
We investigate entanglement of strongly interacting fermions in spatially inhomogeneous environments. To quantify entanglement in the presence of spatial inhomogeneity, we propose a local-density approximation (LDA) to the entanglement entropy, and a nested LDA scheme to evaluate the entanglement entropy on inhomogeneous density profiles. These ideas are applied to models of electrons in superlattice structures with different modulation patterns, electrons in a metallic wire in the presence of impurities, and phase-separated states in harmonically confined many-fermion systems, such as electrons in quantum dots and atoms in optical traps. We find that the entanglement entropy of inhomogeneous systems is strikingly different from that of homogeneous systems.
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PDF链接:
https://arxiv.org/pdf/710.2095


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