This chapter focuses on classical and quantum information as the language of encoding, transmission, and processing.
Use the sequence below as the chapter map. The ordering keeps the classical notions of information in view while the notebook shifts toward genuinely quantum resources and constraints.
One note on order. The qubit, quantum-operation, and channel material in this chapter is on the direct path into computation and is meant to be read before Chapter III. The entropy and information block, by contrast, is advanced quantum Shannon theory: it is grouped here topically but sits off the critical path and is best read after Chapter III, since the algorithms there supply the operational meaning that makes entropy measures concrete. The numbering reflects the topic; the reading order is annotated on the block itself.