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 …

Multiphoton interference reveals strictly nonclassical phenomena. Its applications range
from fundamental tests of quantum mechanics to photonic quantum information processing …

An experimental test of Bell's inequality allows ruling out any local-realistic description of
nature by measuring correlations between distant systems. While such tests are …

Quantum computers hold the promise of solving certain computational tasks much more
efficiently than classical computers. We review recent experimental advances towards a …

The reversible transfer of quantum states of light into and out of matter constitutes an
important building block for future applications of quantum communication: it will allow the …

Several vulnerabilities of single-photon detectors have recently been exploited to
compromise the security of quantum-key-distribution (QKD) systems. In this Letter, we report …

Monodisperse colloidal suspensions of micrometre-sized spheres are playing an
increasingly important role as model systems to study, in real space, a variety of phenomena …

Many applications of quantum communication crucially depend on reversible transfer of
quantum states between light and matter. Motivated by rapid recent developments in theory …

Matter and energy cannot be teleported (that is, transferred from one place to another
without passing through intermediate locations). However, teleportation of quantum states …

Integrated optical components on lithium niobate play a major role in standard high-speed
communication systems. Over the last two decades, after the birth and positioning of …