The impossibility of perfectly copying (or cloning) an unknown quantum state is one of the
basic rules governing the physics of quantum systems. The processes that perform the …

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 …

A strong converse theorem for the classical capacity of a quantum channel states that the
probability of correctly decoding a classical message converges exponentially fast to zero in …

Quantum mechanics is now a mature topic dating back more than a century. During its
scientific development, it fostered many technological advances that now are integrated into …

Single-photon–added coherent states are the result of the most elementary amplification
process of classical light fields by a single quantum of excitation. Being intermediate …

The propagation of light in dispersive media is a subject of fundamental as well as practical
importance. In recent years attention has focused in particular on how refractive index can …

Entanglement between quantum and classical objects is of special interest in the context of
fundamental studies of quantum mechanics and potential applications for quantum …

The orbital angular momentum (OAM) of light, associated with a helical structure of the
wavefunction, has great potential in quantum photonics, as it allows a higher dimensional …

It is unanimously accepted that the quantum and the classical descriptions of the physical
reality are very different, although any quantum process is" mysteriously" transformed …

Attempts at cloning a quantum system result in the introduction of imperfections in the state
of the copies. This is a consequence of the no-cloning theorem, which is a fundamental law …