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 …

Just as atoms exchange electrons to form molecular orbitals, an electromagnetic field can
interact with a quantum system by the exchange of photons. When this interaction is strong …

Fluorescence microscopy has been the workhorse for investigating optical phenomena at
the nanometer scale but this approach confronts several fundamental limits. As a result …

An atom in open space can be detected by means of resonant absorption and reemission of
electromagnetic waves, known as resonance fluorescence, which is a fundamental …

We have embedded an artificial atom, a superconducting transmon qubit, in an open
transmission line and investigated the strong scattering of incident microwave photons (< …

Conventional spectroscopy uses classical light to detect matter properties through the
variation of its response with frequencies or time delays. Quantum light opens up new …

By map** the strong interaction between Rydberg excitations in ultra-cold atomic
ensembles onto single photons via electromagnetically induced transparency, it is now …

Enhancing the optical cross section is an enticing goal in light-matter interactions, due to its
fundamental role in quantum and nonlinear optics. Here, we show how dipolar interactions …

The transistor is one of the most influential inventions of modern times and is ubiquitous in
present-day technologies. In the continuing development of increasingly powerful computers …