The concept of topological energy bands and their manifestations have been demonstrated
in condensed matter systems as a fantastic paradigm toward unprecedented physical …

The traditional view from particle physics is that quantum gravity effects should only become
detectable at extremely high energies and small length scales. Due to the significant …

Non-Hermitian dynamics, as observed in photonic, atomic, electrical and optomechanical
platforms, holds great potential for sensing applications and signal processing. Recently …

Tight bosonic analogs of free-fermionic symmetry-protected topological phases, and their
associated edge-localized excitations, have long evaded the grasp of condensed-matter …

Nonreciprocity means that the transmission of a signal depends on its direction of
propagation. Despite vastly different platforms and underlying working principles, the …

With artificially engineered systems, it is now possible to realize the coherent interaction
rate, which can become comparable to the mode frequencies, a regime known as …

The ground states of noninteracting fermions in one-dimension with chiral symmetry form a
class of topological band insulators, described by a topological invariant that can be related …

Magnetic-free optomechanically induced nonreciprocity may stimulate a wide range of
practical applications in quantum technologies. However, how to suppress the thermal-noise …

We analyze an unusual class of bosonic dynamical instabilities that arise from dissipative (or
non-Hermitian) pairing interactions. We show that, surprisingly, a completely stable …

Collective phenomena arise from interactions within complex systems, leading to behaviors
absent in individual components. Observing quantum collective phenomena with …