In recent years, there has been a rising interest in high‐dimensional quantum states and
their impact on quantum communication. Indeed, the availability of an enlarged Hilbert …

Twisted photons can be used as alphabets to encode information beyond one bit per single
photon. This ability offers great potential for quantum information tasks, as well as for the …

Nearly 30 years ago, two-photon interference was observed, marking the beginning of a
new quantum era. Indeed, two-photon interference has no classical analogue, giving it a …

Optical communication is an integral part of the modern economy, having all but replaced
electronic communication systems. Future growth in bandwidth appears to be on the horizon …

A few years ago the possibility of coupling and inter-converting the spin and orbital angular
momentum (SAM and OAM) of paraxial light beams in inhomogeneous anisotropic media …

The ability to manipulate quantum states of light by integrated devices may open new
perspectives both for fundamental tests of quantum mechanics and for novel technological …

Quantum communication employs the counter-intuitive features of quantum physics for tasks
that are impossible in the classical world. It is crucial for testing the foundations of quantum …

The identification of orbital angular momentum (OAM) as a fundamental property of a beam
of light nearly 25 years ago has led to an extensive body of research around this topic. The …

Many protocols in quantum science, for example, linear optical quantum computing, require
access to large-scale entangled quantum states. Such systems can be realized through …

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 …