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 technique of stimulated Raman adiabatic passage (STIRAP), which allows efficient and
selective population transfer between quantum states without suffering loss due to …

The Jaynes–Cummings Model (JCM) has recently been receiving increased attention as
one of the simplest, yet intricately nonlinear, models of quantum physics. Emphasising the …

Encoding a qubit in logical quantum states with wave functions characterized by disjoint
support and robust energies can offer simultaneous protection against relaxation and pure …

We measure the dispersive energy-level shift of an LC resonator magnetically coupled to a
superconducting qubit, which clearly shows that our system operates in the ultrastrong …

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 …

Superconducting qubits in a waveguide have long-range interactions mediated by photons
that cause the emergence of collective states. Destructive interference between the qubits …

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

Enhancing optical nonlinearities so that they become appreciable on the single photon level
and lead to nonclassical light fields has been a central objective in quantum optics for many …

Creating a train of single photons and monitoring its propagation and interaction is
challenging in most physical systems, as photons generally interact very weakly with other …