A few decades ago, quantum optics stood out as a new domain of physics by exhibiting
states of light with no classical equivalent. The first investigations concerned single photons …

We review methods that allow one to detect and characterize quantum correlations in many-
body systems, with a special focus on approaches which are scalable. Namely, those …

Gaussian states have played an important role in the physics of continuous-variable
quantum systems. They are appealing for the experimental ease with which they can be …

Soliton microcombs—phase-locked microcavity frequency combs—have become the
foundation of several classical technologies in integrated photonics, including spectroscopy …

The magnon cat state represents a macroscopic quantum superposition of collective
magnetic excitations of large number spins that not only provides fundamental tests of …

Macroscopic quantum phenomena, such as observed in superfluids and superconductors,
have led to promising technological advancements and some of the most important tests of …

Einstein-Rosen-Podolsky (EPR) steering or quantum steering describes the “spooky action
at a distance” that one party is able to remotely alter the states of the other if they share a …

The Gottesman-Kitaev-Preskill (GKP) encoding of a qubit within an oscillator is particularly
appealing for fault-tolerant quantum computing with bosons because Gaussian operations …

In the field of continuous-variable quantum information processing, non-Gaussian states
with negative values of the Wigner function are crucial for the development of a fault-tolerant …

Non-Gaussian states with Wigner negativity are of particular interest in quantum technology
due to their potential applications in quantum computing and quantum metrology. However …