Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Hermitian Morphing of Topological Modes   Topological modes are usually localized at defects or boundaries of a much
larger topological lattice. Recent studies of non-Hermitian band theories
unveiled the non-Hermitian skin effect (NHSE), by which the bulk states
collapse to the boundary as skin modes. Here, we theoretically and
experimentally demonstrate that the NHSE can conversely affect wavefunctions of
topological modes. We show that topological modes can be delocalized by the
NHSE and even become in-gap extended modes occupying the entire bulk lattice.
Such a delocalization effect is experimentally realized using active mechanical
metamaterials in both one-dimensional (1D) and two-dimensional (2D) topological
lattices, as well as in a higher-order topological lattice. Furthermore, by the
judicious engineering of the non-Hermiticity distribution, the topological
modes can deform into a diversity of shapes. Our findings not only broaden and
deepen the current understanding of topological modes and the NHSE but also
open new grounds for topological applications.

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The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an