K. Kawabata

Publications37
h-index17
Citations2,471
Highly Influential Citations108
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Topological Phases of Non-Hermitian Systems
Recent experimental advances in controlling dissipation have brought about unprecedented flexibility in engineering non-Hermitian Hamiltonians in open classical and quantum systems. A particular…
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Symmetry and Topology in Non-Hermitian Physics
We develop a complete theory of symmetry and topology in non-Hermitian physics. We demonstrate that non-Hermiticity ramifies the celebrated Altland-Zirnbauer symmetry classification for insulators…
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Topological Origin of Non-Hermitian Skin Effects.
TLDR
It is revealed that the skin effect originates from intrinsic non-Hermitian topology, which explains the universal feature of the known skin effect, and leads to new types of the skin effects-symmetry-protected skin effects.
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Information Retrieval and Criticality in Parity-Time-Symmetric Systems.
By investigating information flow between a general parity-time (PT-)symmetric non-Hermitian system and an environment, we find that the complete information retrieval from the environment can be…
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Second-Order Topological Phases in Non-Hermitian Systems.
A d-dimensional second-order topological insulator (SOTI) can host topologically protected (d-2)-dimensional gapless boundary modes. Here, we show that a 2D non-Hermitian SOTI can host zero-energy…
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Classification of Exceptional Points and Non-Hermitian Topological Semimetals.
TLDR
This classification of generic topologically stable exceptional points is presented according to two types of complex-energy gaps and fundamental symmetries of charge conjugation, parity, and time reversal and reveals unique non-Hermitian gapless structures with no Hermitian analogs.
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Topological unification of time-reversal and particle-hole symmetries in non-Hermitian physics
TLDR
It is shown that in non-Hermitian systems, such as those with gain and loss, time-reversal and particle-hole symmetries are equivalent to each other, unifying otherwise distinct topological classes and leading to emergent non- hermitian topological phases.
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Anomalous helical edge states in a non-Hermitian Chern insulator
A non-Hermitian extension of a Chern insulator and its bulk-boundary correspondence are investigated. It is shown that in addition to the robust chiral edge states that reflect the nontrivial…
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Exact zero modes in twisted Kitaev chains
We study the Kitaev chain under generalized twisted boundary conditions, for which both the amplitudes and the phases of the boundary couplings can be tuned at will. We explicitly show the presence…
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Non-Hermitian Many-Body Localization.
TLDR
It is demonstrated that a real-complex transition profoundly affects the dynamical stability of non-Hermitian interacting systems with asymmetric hopping that respects time-reversal symmetry.
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