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arXiv 1202.2837cond-mat.mes-hallcond-mat.str-el
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Majorana量子线中无序和相互作用的相互作用

Interplay of disorder and interaction in Majorana quantum wires

Alejandro M. Lobos, Roman M. Lutchyn, S. Das Sarma

摘要:

研究了具有局域马约拉纳零能态的一维拓扑超导体中无序和相互作用的相互作用。利用Abel玻色化和微扰重整化群(RG)方法,我们得到了RG流和相关参数的标度维数,并确定了低能理论的临界点.我们预测了从拓扑超导相到非拓扑局域相的量子相变,并得到了这两个相之间的相边界作为电子-电子相互作用和纳米线中的无序强度的函数。基于一个瞬子分析,其中包括无序的影响,我们还确定了一个大的制度的稳定性的马约拉纳携带拓扑相的参数空间中的模型。

英文摘要:

We study the interplay between disorder and interaction in one-dimensional topological superconductors which carry localized Majorana zero-energy states. Using Abelian bosonization and the perturbative renormalization group (RG) approach, we obtain the RG-flow and the associated scaling dimensions of the parameters and identify the critical points of the low-energy theory. We predict a quantum phase transition from a topological superconducting phase to a non-topological localized phase, and obtain the phase boundary between these two phases as a function of the electron-electron interaction and the disorder strength in the nanowire. Based on an instanton analysis which incorporates the effect of disorder, we also identify a large regime of stability of the Majorana-carrying topological phase in the parameter space of the model.

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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