Using quantum computing algorithms in future satellite communication

Since the beginning of long-distance communication, there has been a need to connect telecommunications networks of a country to another. Quantum computing offers revolutionary solutions in the field of computer science, applying the opportunities of quantum physics which are incomparably richer than those of classical physics. Although quantum computers are going to be the tools of the distant future, there already exist algorithms to solve problems which are very difficult to handle with traditional computers. Satellite communication has been used for many years, and nowadays we know its limits. In contrast, quantum computing is a fascinating new and fast improving technology. Therefore, it is indeed fascinating and well worthwhile to examine the relationship of satellite communication and quantum computing. At first, we briefly introduce some important elements of quantum information theory, including the free-space quantum key distribution. The aim is to trace some adoptable algorithms in the communication between the Earth and the satellite and also between satellites. For this reason we try to build a new model for the free-space quantum channel. This is the first report of our simulation project.