Cavity magnonics deals with the interaction of magnons—elementary excitations in
magnetic materials—and confined electromagnetic fields. We introduce the basic physics …

Quantum-mechanical effects at the macroscopic level were first explored in Josephson-
junction-based superconducting circuits in the 1980s. In recent decades, the emergence of …

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

The ability to generate particles from the quantum vacuum is one of the most profound
consequences of Heisenberg's uncertainty principle. Although the significance of vacuum …

Photon detectors are an elementary tool to measure electromagnetic waves at the quantum
limit, and are heavily demanded in the emerging quantum technologies such as …

Single-photon detection is an essential component in many experiments in quantum optics,
but it remains challenging in the microwave domain. We realize a quantum nondemolition …

Hybrid quantum devices expand the tools and techniques available for quantum sensing in
various fields. Here, we experimentally demonstrate quantum sensing of a steady-state …

In cavity optomechanics, nanomechanical motion couples to a localized optical mode. The
regime of single-photon strong coupling is reached when the optical shift induced by a …

Single photon detection is a key resource for sensing at the quantum limit and the enabling
technology for measurement-based quantum computing. Photon detection at optical …