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arXiv 2512.09693cond-mat.mes-hall
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在Kitaev SSH链中控制拓扑量子比特的域壁

Domain Wall Control of Topological Qubits in the Kitaev SSH Chain

Universidade Federal do Amazonas(亚马孙联邦大学)

Griffith Rufo, Sabrina Rufo, Heron Caldas, Rosiane de Freitas

AI总结:

通过在Kitaev SSH链中引入域壁,实现对拓扑量子比特的可控操作,提供了一种更稳健的量子计算方法。

摘要:

在一维SSH Kitaev混合系统中,零能量态已成为拓扑量子比特的有希望候选者。在我们的工作中,我们表明在具有各向异性超导相关性的链中引入域壁,提供了一种有效控制这些边界模式数量和性质的方法。缺陷起到一个数字旋钮的作用:其存在与否翻转零模式的奇偶性,从而决定链末端是否孤立存在Majorana费米子。这种开/关机制比精细调节全局参数如化学势或跃迁幅度显著更稳健和简单。此外,各向异性提供了额外的杠杆来校准缺陷的影响,开辟了拓扑量子比特可通过域壁局部寻址的架构路径。本提案将缺陷重新定义为不完美,而是作为量子信息和计算的有用资源。

英文摘要:

Zero energy states in one dimensional SSH Kitaev hybrid systems have emerged as promising candidates for topological qubits. In our work, we show that introducing a domain wall into a chain with anisotropic superconducting correlations provides a powerful way to control both the number and the nature of these boundary modes. The defect acts as a digital knob: its presence or absence flips the parity of zero modes and thus decides whether an isolated Majorana exists at the chain ends. This on/off mechanism is significantly more robust and simpler than fine-tuning global parameters such as chemical potential or hopping amplitudes. Moreover, anisotropy provides an additional lever to calibrate the effect of the defect, opening a pathway to architectures where topological qubits can be locally addressed by domain walls. This proposal reframes defects not as imperfections, but as useful resources for quantum information and computation.

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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