Characterizing topological order in superconductors via entanglement

Characterizing topological order in superconductors via entanglement
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通过纠缠表征超导体的拓扑顺序

DOI:
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发表时间:
2014
期刊:
Journal of Physics: Condensed Matter
影响因子:
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通讯作者:
Eugene H. Kim
Eugene H. Kim
中科院分区:
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文献类型:
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作者:
Eugene H. Kim

文献摘要

被引文献

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我们研究/表征超导系统中的拓扑序使用纠缠。演示/利用纠缠的方向依赖性,结果显示为二维dx 2 −y2?> dx2-y2?+idxy自旋单重态超导体,并与自旋极化px+ipy超导体的结果进行了比较;我们还讨论了磁通穿过的一维自旋极化p波超导体的拓扑性质。在进行这些调查,我们建立了一个有效的方法来调查纠缠在超导体,或更一般地说,在二次费米子哈密顿与配对相互作用。
We investigate/characterize topological order in superconducting systems using entanglement. Demonstrating/utilizing the directional dependence of the entanglement, results are shown for two-dimensional dx2−y2 ?> and dx2−y2 ?> +idxy spin-singlet superconductors, comparing the results to those for a spin-polarized px+ipy superconductor; we also discuss the topological properties of a one-dimensional spin-polarized p-wave superconductor threaded by a magnetic flux. In carrying out these investigations, we establish an efficient approach to investigate entanglement in superconductors or, more generally, in quadratic fermionic Hamiltonians with pairing interactions.