The production of pairs of entangled photons simply by focusing a laser beam onto a crystal
with a nonlinear optical response was used to test quantum mechanics and to open new …

The first quantum technology that harnesses quantum mechanical effects for its core
operation has arrived in the form of commercially available quantum key distribution …

Exploiting a particular wave property for a particular application necessitates components
capable of discriminating in the basis of that property. While spectral or polarisation …

Entanglement of the properties of two separated particles constitutes a fundamental
signature of quantum mechanics and is a key resource for quantum information science. We …

The distinctive non-classical features of quantum physics were first discussed in the seminal
paper by A. Einstein, B. Podolsky and N. Rosen (EPR) in 1935. In his immediate response …

This Colloquium examines the field of the Einstein, Podolsky, and Rosen (EPR) gedanken
experiment, from the original paper of Einstein, Podolsky, and Rosen, through to modern …

Einstein-Rosen-Podolsky (EPR) steering or quantum steering describes the “spooky action
at a distance” that one party is able to remotely alter the states of the other if they share a …

Within the hierarchy of inseparable quantum correlations, Einstein-Podolsky-Rosen steering
is distinguished from both entanglement and Bell nonlocality by its asymmetry—there exist …

Nonlinear magnonics studies the nonlinear interaction between magnons and other
physical platforms (phonon, photon, qubit, spin texture) to generate novel magnon states for …

Squeezed states of light constitute an important nonclassical resource in the field of high-
precision measurements, for example, gravitational wave detection, as well as in the field of …