Quantum information is a rapidly advancing area of interdisciplinary research. It may lead to
real-world applications for communication and computation unavailable without the …

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 …

Consider three qubits A, B, and C which may be entangled with each other. We show that
there is a trade-off between A's entanglement with B and its entanglement with C. This …

In recent years, there has been a rising interest in high‐dimensional quantum states and
their impact on quantum communication. Indeed, the availability of an enlarged Hilbert …

In theory, quantum computers offer a means of solving problems that would be intractable on
conventional computers. Assuming that a quantum computer could be constructed, it would …

We present the experimental observation of polarization entanglement for three spatially
separated photons. Such states of more than two entangled particles, known as …

We investigate the “teleportation” of a quantum state using three-particle entanglement to
either one of two receivers in such a way that, generally, either one of the two, but only one …

Quantum teleportation is one of the most important protocols in quantum information. By
exploiting the physical resource of entanglement, quantum teleportation serves as a key …

The impossibility of perfectly copying (or cloning) an unknown quantum state is one of the
basic rules governing the physics of quantum systems. The processes that perform the …

A few years ago the possibility of coupling and inter-converting the spin and orbital angular
momentum (SAM and OAM) of paraxial light beams in inhomogeneous anisotropic media …