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 modern primary voltage standard is based on the ac Josephson effect and the ensuing
Shapiro steps, where a microwave tone applied to a Josephson junction yields a constant …

We propose an experimentally feasible scheme for generating antibunched N-photon
bundles by a dc voltage-biased Josephson junction in series with a superconducting …

We show that a properly dc-biased Josephson junction in series with two microwave
resonators of different frequencies emits photon pairs in the resonators. By measuring auto …

We introduce a general method to engineer arbitrary Hamiltonians in the Floquet phase
space of a periodically driven oscillator, based on the noncommutative Fourier …

We perform two-tone spectroscopy on quantum circuits, where high-frequency radiation is
generated by a voltage-biased superconductor-normal-superconductor Josephson junction …

We explore the dissipative dynamics of nonlinearly driven oscillator systems tuned to
resonances where multiple excitations are generated. Such systems are readily realised in …

We demonstrate an on-demand source of microwave single photons with 71–99% intrinsic
quantum efficiency. The source is narrowband (300 kHz) and tuneable over a 600 MHz …

We present and analyze a reservoir-engineering approach to stabilizing Fock states in a
superconducting microwave cavity which does not require any microwave-frequency control …

Single-photon generation is an important proof of the underlying quantum nature of a
physical process and a ubiquitous tool for scientific exploration, with applications ranging …