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

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

Abstract Models of light–matter interactions in quantum electrodynamics typically invoke the
dipole approximation,, in which atoms are treated as point-like objects when compared to …

Routing quantum information between non-local computational nodes is a foundation for
extensible networks of quantum processors. Quantum information transfer between arbitrary …

We demonstrate a superconducting artificial atom with strong unidirectional coupling to a
microwave photonic waveguide. Our artificial atom is realized by coupling a transmon qubit …

In quantum-optics experiments with both natural and artificial atoms, the atoms are usually
small enough that they can be approximated as pointlike compared to the wavelength of the …

We study the generation of quantum entanglement between two giant atoms coupled to a
one-dimensional waveguide. Since each giant atom interacts with the waveguide at two …

Engineering light-matter interactions at the quantum level has been central to the pursuit of
quantum optics for decades. Traditionally, this has been done by coupling emitters, typically …

We study the collective effects that emerge in waveguide quantum electrodynamics where
several (artificial) atoms are coupled to a one-dimensional superconducting transmission …

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 …