All our former experience with application of quantum theory seems to say that what is
predicted by quantum formalism must occur in the laboratory. But the essence of quantum …

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 …

Over the past few decades, significant progress has been made in quantum information
technology, from theoretical studies to experimental demonstrations. Revolutionary quantum …

Entangled-photon sources with simultaneously near-unity heralding efficiency and
indistinguishability are the fundamental elements for scalable photonic quantum …

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

Multipartite entangled states are crucial for numerous applications in quantum information
science. However, the generation and verification of multipartite entanglement on fully …

The generation, manipulation and fundamental understanding of entanglement lies at the
very heart of quantum mechanics. Entangled particles are non-interacting but are described …

Among the classes of highly entangled states of multiple quantum systems, the so-called
'Schrödinger cat'states are particularly useful. Cat states are equal superpositions of two …

ABSTRACT Spontaneous Parametric Down-Conversion (SPDC), also known as parametric
fluorescence, parametric noise, parametric scattering and all various combinations of the …

Transferring an unknown quantum state over arbitrary distances is essential for large-scale
quantum communication and distributed quantum networks. It can be achieved with the help …