This review covers the latest developments in continuous-variable quantum-state
tomography of optical fields and photons, placing a special emphasis on its practical aspects …

Seventy five years ago, three remarkable papers by Schrödinger, Kennard and Darwin were
published. They were devoted to the evolution of Gaussian wave packets for an oscillator, a …

Quantum metrology uses non-classical states, such as Fock states with a specific number of
photons, to achieve an advantage over classical sensing methods. Typically, quantum …

We introduce states defined by‖ α, m>= am‖ α> up to a normalization constant, where‖
α> is a coherent state and m an integer. We study the mathematical and physical properties …

The quantum statistical properties of radiation represent an important branch of modern
physics with rapidly increasing applications in spectroscopy, quantum generators of …

It is a long-standing goal to create light with unique quantum properties such as squeezing
and entanglement. We propose the generation of quantum light using free-electron …

Quantum superposition in mechanical systems is not only key evidence for macroscopic
quantum coherence, but can also be utilized in modern quantum technology. Here we …

Quantum control has been of increasing interest in recent years, eg for tasks like state
initialization and stabilization. Feedback-based strategies are particularly powerful, but also …

We present a review of theoretical and experimental aspects of multiphoton quantum optics.
Multiphoton processes occur and are important for many aspects of matter–radiation …

The large available Hilbert space and high coherence of cavity resonators make these
systems an interesting resource for storing encoded quantum bits. To perform a quantum …