Abstract Second-order (χ (2)) optical nonlinearity is one of the most common mechanisms for
modulating and generating coherent light in photonic devices. Due to strong photon …

The progress in chiral light–matter interaction in the quantum regime leads to emergence of
chiral quantum optics and quantum nonreciprocity. Spin‐momentum locking is at the heart of …

Entanglement between distant massive mechanical oscillators is of particular interest in
quantum-enabled devices due to its potential applications in distributed quantum …

While the squeezing of a propagating field can, in principle, be made arbitrarily strong, the
cavity-field squeezing is subject to the well-known 3 dB limit, and thus has limited …

The recently developed hybrid magnonics provides new opportunities for advances in both
the study of magnetism and the development of quantum information processing. However …

We demonstrate the emergence of nonreciprocal superradiant phase transitions and novel
multicriticality in a cavity quantum electrodynamics system, where a two-level atom interacts …

We investigate nonreciprocal photon correlations in coupled microring resonators with
directional quantum squeezing (quantum parametric amplification). We show that the …

We theoretically propose an all-optical scheme to implement a giant nonreciprocal
unconventional photon blockade (UPB) in a single photonic device. By considering the …

We propose a scheme to generate nonreciprocal photon blockade in a stationary
whispering gallery microresonator system based on two physical mechanisms. One of the …

We study how to achieve, manipulate, and switch classical or quantum nonreciprocal effects
of light with a spinning Kerr resonator. In particular, we show that even when there is no …