In few years quantum satellites will be launched. QKD using space links have been proposed and experimented with. Also, some experimental networks have been implemented. A number of protocols have been proposed and some of them have been implemented, and now a number of commercial products have been announced. Quantum Key Distribution (QKD) using cryptographic protocols has received much attention due its importance in network security. Both of them employs quantum entanglement.
Two applications will be briefly presented: quantum teleportation and superdense coding. However, the second problem is being researched upon. The first problem was partially resolved. The quantum channel capacity problem was divided into two problems: transmitting classical information over a quantum channel, and transmitting quantum information over a quantum channel. Then the quantum compression theorem was proved. Quantum communication started with defining the basic unit of information, the qubit.
#Correlated errors quantum error correction verification
The categorical quantum model is based on category theory and one of its main applications is the study and verification of network and cryptographic protocols. The Adiabatic quantum model has reached the commercial stage through a start-up company using superconducting chips. Quantum Computation has three models: the circuit model that is using different techniques like superconducting elements and special Silicon-based elements. Each one of them has a number of topics with some implementations that have reached the commercial level. Quantum Information Systems comprise three disciplines: Quantum Computation, Quantum Communication, and Quantum Control. The main pillars of quantum mechanics are: Superposition, Interference, and Entanglement. Therefore, the postulates of quantum mechanics are given based on one interpretation that is called the Copenhagen interpretation. In this Book is an overview of Quantum Information Systems is given.