Waveguide QED with cold atoms provides a potent platform for the study of non-equilibrium, many-body, and open-system quantum dynamics. Even weak coupling strong photon loss, collective enhancement light-atom interactions leads to correlations photons arising in transmission, as shown recent experiments. Here we apply an improved mean-field theory based on higher-order cumulant expansions descr...

We study the propagation of high-amplitude sound waves, in form pulse-like solitary an air-filled acoustic waveguide periodically varying cross section. Our numerical simulations, solving compressible Navier–Stokes equations two dimensions, as well our experimental results, strongly suggest that nonlinear losses, originated from vortex shedding (at segment changes) are crucial dynamics high amp...

Adiabatic processes are ubiquitous in physics and engineering. A drawback of such is that they tend to be slow, either time–for atomic systems, for example–or space–for photonic sys...

Power-dependent switching between the interacting modes of nonlinear dual-core (two-waveguide) couplers has attracted a great deal of interest during the past several years (see, for example, Synder et al.1 for a review of various physically important situations). In the theoretical papers2 -4 it has been demonstrated that three-waveguide nonlinear directional couplers offer some distinct advan...

Abstract— This work investigates the improvement of the active reflection coefficient of waveguide-fed phased-array antenna using liquid crystal layers. The anisotropy properties of liquid crystal layer can be employed to eliminate blind scan angle and improve the wide angle impedance matching of the waveguide-fed phased array antennas. The authors have expressed the modal analysis of the waveg...