Boson sampling is a computational problem that has recently been proposed as a candidate
to obtain an unequivocal quantum computational advantage. The problem consists in …

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

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 …

Linear optics underpins fundamental tests of quantum mechanics and quantum
technologies. We demonstrate a single reprogrammable optical circuit that is sufficient to …

Quantum interference of two independent particles in pure quantum states is fully described
by the particles' distinguishability: the closer the particles are to being identical, the higher …

The identification of phenomena able to pinpoint quantum interference is attracting large
interest. Indeed, a generalization of the Hong–Ou–Mandel effect valid for any number of …

The main features of quantum mechanics reside in interference deriving from the
superposition of different quantum states. While current quantum optical technology enables …

This article is a detailed introduction to Hong-Ou-Mandel (HOM) interference, in which two
photons interfere on a beamsplitter in a way that depends on the photons' distinguishability …

Photons are natural carriers of high-dimensional quantum information, and, in principle, can
benefit from higher quantum information capacity and noise resilience. However, schemes …

We report on a universal method to measure the genuine indistinguishability of n photons—
a crucial parameter that determines the accuracy of optical quantum computing. Our …