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arXiv 2203.13486quant-phcond-mat.str-elphysics.optics
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非厄米拓扑皮肤模式的自愈性

Self-healing of non-Hermitian topological skin modes

Stefano Longhi

摘要:

非厄米系统的一个独特特征是其趋肤效应,即在具有开放或半无限边界的晶格中大量体带本征态的边缘局域化。与厄米系统中的扩展布洛赫波不同,皮肤模式是源自布洛赫带能谱的固有非厄米点隙拓扑的哈密顿量的可归一化本征态。在这里,我们揭开了NH皮肤模式的一个迷人的属性,即自我修复,即在被时空势散射后自我重建其形状的能力。

英文摘要:

A unique feature of non-Hermitian (NH) systems is the NH skin effect, i.e. the edge localization of an extensive number of bulk-band eigenstates in a lattice with open or semi-infinite boundaries. Unlike extended Bloch waves in Hermitian systems, the skin modes are normalizable eigenstates of the Hamiltonian that originate from the intrinsic non-Hermitian point-gap topology of the Bloch band energy spectra. Here we unravel a fascinating property of NH skin modes, namely self-healing, i.e. the ability to self-reconstruct their shape after being scattered off by a space-time potential.

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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