The book is devoted to the latest problems of quantum theory: quantum logic, quantum teleportation, quantum computers. The rapid development of these areas turns quantum mechanics into the basis of technologies of the XXI century, the development of which is impossible without addressing the fundamental issues of modern physics. Much attention is paid to the history of the formation of quantum mechanics, which gives the reader the opportunity to form an independent opinion on the fundamental problems of the theory. This will allow him to freely navigate the current trends in the development of quantum technologies. For a wide range of readers - students, graduate students, researchers and everyone interested in the basics and the latest achievements of quantum mechanics