Photonic quantum technologies represent a promising platform for several applications,
ranging from long-distance communications to the simulation of complex phenomena …

How can one prove that a given quantum state is entangled? In this paper we review
different methods that have been proposed for entanglement detection. We first explain the …

Device-independent quantum secure direct communication (DI-QSDC) can relax the
security assumptions about the devices' internal working, and effectively enhance QSDC's …

Controlling the various degrees‐of‐freedom (DoFs) of structured light at both quantum and
classical levels is of paramount importance in optics. It is a conventional paradigm to treat …

Hyperentanglement is a promising resource in quantum information processing with its high
capacity character, defined as the entanglement in multiple degrees of freedom (DOFs) of a …

Entanglement purification is a very important element for long-distance quantum
communication. Different from all the existing entanglement purification protocols (EPPs) in …

It is impossible to unambiguously distinguish the four Bell states in polarization, resorting to
linear optical elements only. Recently, the hyperentangled Bell state, the simultaneous …

Hyperentanglement, the simultaneous entanglement in more than one degree of freedom
(DOF), plays an important role in quantum communication and quantum information …

Controlling and manipulating the polarization state of a light beam is crucial in applications
ranging from optical sensing to optical communications, both in the classical and quantum …

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