The Classic Information Theory, developed by Claude Elwood Shannon on the first half of the twentieth century, allowed the evolution of communications techniques by means of a more deep understanding of the characteristics of a communication channel, besides the indispensable notion of Entropy. When replacing the classic tools, used nowadays in communications, by the quantum tools, what would be the kind of evolution that this would bring to the communications techniques? Through the analysis of the quantum theory on the background of Information Theory, we seek to understand and use these tools, in the intention of building a broader and richer view over communications.