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

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 …

Quantum teleportation—the transmission and reconstruction over arbitrary distances of the
state of a quantum system—is demonstrated experimentally. During teleportation, an initial …

Secret sharing is a procedure for splitting a message into several parts so that no subset of
parts is sufficient to read the message, but the entire set is. We show how this procedure can …

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

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

We experimentally entangle freely propagating particles that never physically interacted with
one another or which have never been dynamically coupled by any other means. This …

The superposition principle plays the most central role in all considerations of quantum
information, and in most of the" gedanken" experiments and even the paradoxes of quantum …

Quantum cryptography holds the promise to establish an information-theoretically secure
global network. All field tests of metropolitan-scale quantum networks to date are based on …

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