ABSTRACT
In this chapter, I will show that information-transmission (IT) can be carried out within a quantum unit, as defined by the Heisenberg Uncertainty Principle, in which this unit can be translated as a quantum limited subspace (QLS). We will show that the size of a QLS is determined by the carrier bandwidth; that is, the narrower the bandwidth, the larger the size of the QLS can be used for complex amplitude communication. By understanding the pros and the cons of IT within the QLS, more innovative communication techniques can be developed and employed in practice, for example, as applied to security IT within the QLS. Imaging using phase conjugation idea will be illustrated. A new era of innovative communication is anticipated to emerge and it will change the way we used to communicate forever!
