Self-healing of non-Hermitian topological skin modes
- URL: http://arxiv.org/abs/2203.13486v1
- Date: Fri, 25 Mar 2022 07:37:12 GMT
- Title: Self-healing of non-Hermitian topological skin modes
- Authors: Stefano Longhi
- Abstract summary: 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.
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.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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.
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