This review describes the emerging field of waveguide quantum electrodynamics concerned
with the interaction of photons propagating in a waveguide with localized quantum emitters …

In the past 20 years, impressive progress has been made both experimentally and
theoretically in superconducting quantum circuits, which provide a platform for manipulating …

The realization of strong interactions between individual photons is a long-standing goal of
both fundamental and technological significance. Scientists have known for over half a …

Photon-photon scattering in vacuum is extremely weak. However, strong effective
interactions between single photons can be realized by employing strong light-matter …

We discuss the properties of atom-photon bound states in waveguide QED systems
consisting of single or multiple atoms coupled strongly to a finite-bandwidth photonic …

We propose an experimentally accessible single-photon routing scheme using a△-type
three-level atom embedded in quantum multichannels composed of coupled-resonator …

We extend the input-output formalism of quantum optics to analyze few-photon transport in
waveguides with an embedded qubit. We provide explicit analytical derivations for one-and …

This article reviews theoretical methods developed in the last decade to understand cavity
quantum electrodynamics in the ultrastrong‐coupling regime, where the strength of the light …

We develop a scattering theory to investigate the multiphoton transmission in a one-
dimensional waveguide in the presence of quantum emitters. It is based on a path integral …

There has been rapid development of systems that yield strong interactions between freely
propagating photons in one-dimension via controlled coupling to quantum emitters. This …