Topological insulators feature a number of topologically protected boundary modes linked to
the value of their bulk invariant. While in one-dimensional systems the boundary modes are …

Abstract Non-Hermitian (NH) lattice Hamiltonians display a unique kind of energy gap and
extreme sensitivity to boundary conditions. Due to the NH skin effect, the separation …

The introduction of non-Hermiticity into topological systems has led to a series of novel
physical phenomena and produced application prospects. Here, we combine non-Hermitian …

We study the effect of quasiperiodic and periodic onsite potentials in a Hatano-Nelson
model with next-nearest-neighbor hopping. By considering a nonreciprocal next-nearest …

Amid the growing interest in non-Hermitian quantum systems, noninteracting models have
received the most attention. Here, through the stochastic series expansion quantum Monte …

The emergence of chiral anomaly entails various fascinating phenomena such as
anomalous quantum Hall effect and chiral magnetic effect in different branches of (non-) …

We discover a deep connection between parity-time symmetric optical systems and quantum
transport in one-dimensional fermionic chains in a two-terminal open system setting. The …

Chiral quantum optics is a growing field of research where light-matter interactions become
asymmetrically dependent on momentum and spin, offering novel control over photonic and …

We study the phenomena of topological amplification in arrays of parametric oscillators. We
find two phases of topological amplification, both with directional transport and exponential …

We introduce a driven-dissipative Bose-Hubbard chain describing coupled lossy photonic
modes, in which time-reversal symmetry is broken by a coherent drive with a uniform phase …