This section focuses on quantum states treated as informational resources and carriers of computation.
Use the sequence below as the local map for this section. The on-path core runs qubits (01) → quantum computation basics (02) → quantum noise and operations (03); these carry directly into Chapters III–VI. The entropy block (05) is the advanced capstone of this section — it develops quantum Shannon theory and is best read after the algorithms in Chapter III, so it is marked off the critical path rather than treated as a gate to the later chapters.