Quantum-walk transport properties on graphene structures
Quantum-walk transport properties on graphene structures
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DOI：
10.1103/physreva.94.062331
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发表时间：
2016-12-23
影响因子：
2.9
通讯作者：
Kendon, Viv
中科院分区：
文献类型：
--
作者：
Bougroura, Hamza;Aissaoui, Habib;Kendon, Viv
我们提出了量子行走的C-60和相关的石墨烯结构的数值研究，以调查其输运性质。也称为蜂窝晶格，由石墨烯相中的碳原子形成的晶格可以卷起以形成各种尺寸的纳米管。石墨烯纳米管有许多重要的应用，其中一些依赖于其不寻常的导电性和相关特性。图上的量子行走提供了一个抽象的环境，在其中研究这种独立于物理物质的其他化学和物理性质的输运性质。因此，它们可以用于进一步理解这些属性背后的机制。我们发现，纳米管结构是显着更有效地传输量子行走比同等大小的周期，提供的对称性的结构是尊重他们如何使用。我们发现更快的传输锯齿形纳米管相比扶手椅型纳米管，这是出乎意料的，因为对于实际材料的扶手椅型纳米管是金属的，而锯齿形是半导体。
We present numerical studies of quantum walks on C-60 and related graphene structures to investigate their transport properties. Also known as a honeycomb lattice, the lattice formed by carbon atoms in the graphene phase can be rolled up to form nanotubes of various dimensions. Graphene nanotubes have many important applications, some of which rely on their unusual electrical conductivity and related properties. Quantum walks on graphs provide an abstract setting in which to study such transport properties independent of the other chemical and physical properties of a physical substance. They can thus be used to further the understanding of mechanisms behind such properties. We find that nanotube structures are significantly more efficient in transporting a quantum walk than cycles of equivalent size, provided the symmetry of the structure is respected in how they are used. We find faster transport on zigzag nanotubes compared to armchair nanotubes, which is unexpected given that for the actual materials the armchair nanotube is metallic, while the zigzag is semiconducting.