Since its discovery, quantum entanglement has challenged some of the best established
views of the world: locality and reality. Quantum technologies promise to revolutionize …

A tomographic measurement is a ubiquitous tool for estimating the properties of quantum
states, and its application is known as quantum state tomography (QST). The process …

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 …

Vector beams, non-separable in spatial mode and polarisation, have emerged as enabling
tools in many diverse applications, from communication to imaging. This applicability has …

We use entropic uncertainty relations to formulate inequalities that witness Einstein-
Podolsky-Rosen (EPR)-steering correlations in diverse quantum systems. We then use …

Quantum teleportation faces increasingly demanding requirements for transmitting large or
even entangled systems. However, knowledge of the state to be transmitted eases its …

Entanglement is nowadays considered as a key quantity for the understanding of
correlations, transport properties and phase transitions in composite quantum systems, and …

We demonstrate electromagnetic quantum states of single photons and of correlated photon
pairs exhibiting “hybrid” entanglement between spin and orbital angular momentum. These …

We present an entanglement purification protocol (EPP) to reconstruct some maximally
hybrid entangled states (HESs) from nonmaximally mixed HESs. We use simple linear …

Quantum systems such as, for example, photons, atoms, or Bose-Einstein condensates,
prepared in complex states where entanglement between distinct degrees of freedom is …