Reciprocity is a fundamental physical principle that roots in the time‐reversal symmetry of
physical laws. It allows making predictions on any arbitrary complex system's response and …

Optical nonreciprocity is important in photonic information processing to route the optical
signal or prevent the reverse flow of noise. By adopting the strong nonlinearity associated …

Nonreciprocal devices are a key element for signal routing and noise isolation. Rapid
development of quantum technologies has boosted the demand for a new generation of …

We demonstrate the possibility of designing efficient, nonreciprocal few-photon devices by
exploiting the chiral coupling between two waveguide modes and a single quantum emitter …

A quantum thermal transistor is designed by the strong coupling between one qubit and one
qutrit which are in contact with three heat baths with different temperatures. The thermal …

We investigate the open dynamics of a qubit due to scattering of a single photon in an
infinite or semi-infinite waveguide. Through an exact solution of the time-dependent multi …

We investigate a single-photon diode realized by a one-dimensional waveguide chirally
coupled to N spatially separated Λ-type three-level emitters. An external laser is introduced …

Quantum thermal devices which can manage heat as their electronic analogs for the
electronic currents have attracted increasing attention. Here a three-terminal quantum …

We investigate single photon transport in two waveguides coupled to a two-level quantum
emitter (QE). With the deduced analytical scattering amplitudes, we show that under …

Nonreciprocity originating from classical interactions among nonlinear scatterers has been
attracting increasing attention in the quantum community, offering a promising tool to control …