Self-Healing of Non-Hermitian Topological Skin Modes

被引:79
作者
Longhi, Stefano [1 ,2 ]
机构
[1] Politecn Milan, Dipartimento Fis, Piazza Leonardo Vinci 32, I-20133 Milan, Italy
[2] IFISC UIB CSIC, Inst Fis Interdisciplinar & Sistemas Complejos, E-07122 Palma de Mallorca, Spain
关键词
NON-BLOCH; BEAMS; DIFFRACTION; GENERATION; BESSEL; TRANSITIONS;
D O I
10.1103/PhysRevLett.128.157601
中图分类号
O4 [物理学];
学科分类号
0702 ;
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.
引用
收藏
页数:7
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