The past decades have witnessed an explosion of interest in topological materials, and a lot
of mathematical concepts have been introduced in condensed matter physics. Among them …

Non-Hermitian band structures have gained considerable attention due to the novel
phenomena not present in their Hermitian counterparts and their connection to various …

A unique feature of non-Hermitian (NH) systems is the NH skin effect, ie, the edge
localization of an extensive number of bulk-band eigenstates in a lattice with open or semi …

Non-Hermitian systems exhibit nontrivial band topology and a strong sensitivity of the
energy spectrum on the boundary conditions. Remarkably, a macroscopic number of bulk …

Non-Hermitian systems show a non-Hermitian skin effect, where the bulk states are
localized at a boundary of the systems with open boundary conditions. In this paper, we …

The non-Bloch band theory can describe energy bands in a one-dimensional (1D) non-
Hermitian system. On the other hand, whether the non-Bloch band theory can be extended …

Recently, it was discovered that certain non-Hermitian systems can exhibit qualitative
different properties at different system sizes, such as being gapless at small sizes and …

The fermionic Kitaev chain is a canonical model featuring topological Majorana zero modes.
We report the experimental realization of its bosonic analogue in a nano-optomechanical …

We theoretically predict the squeezing-induced point-gap topology together with a symmetry-
protected Z 2 “skin effect” in a one-dimensional (1D) quadratic-bosonic system. Protected by …

The energy bands of non-Hermitian systems exhibit nontrivial topological features that arise
from the complex nature of the energy spectrum. Under periodic boundary conditions …