Modal decomposition of light has been known for a long time, applied mostly to pattern
recognition. With the commercialization of liquid-crystal devices, digital holography as an …

The optical fibre is an essential tool for our communication infrastructure since it is the main
transmission channel for optical communications. The latest major advance in optical fibre …

We present an experimental study of higher-dimensional quantum key distribution protocols
based on mutually unbiased bases, implemented by means of photons carrying orbital …

The capability to generate and manipulate quantum states in high-dimensional Hilbert
spaces is a crucial step for the development of quantum technologies, from quantum …

Multiplexing is a strategy to augment the transmission capacity of a communication system. It
consists of combining multiple signals over the same data channel and it has been very …

The secure transfer of information is an important problem in modern telecommunications.
Quantum key distribution (QKD) provides a solution to this problem by using individual …

Mutually unbiased bases (MUBs) play a key role in many protocols in quantum science,
such as quantum key distribution. However, defining MUBs for arbitrary high-dimensional …

High-dimensional entanglement promises to increase the information capacity of photons
and is now routinely generated, exploiting spatiotemporal degrees of freedom of single …

The quantum Cramér-Rao bound is a cornerstone of modern quantum metrology, as it
provides the ultimate precision in parameter estimation. In the multiparameter scenario, this …

High-dimensional Hilbert spaces used for quantum communication channels offer the
possibility of large data transmission capabilities. We propose a method of characterizing …