Qubits, Superposition & Quantum State Representation

How a qubit's state differs from a classical bit — superposition, the Bloch sphere, and bra-ket notation for describing quantum states.

Read

49 min

Practice MCQs

25

Interview QA

25

Edition

v2

Editorial status

Reviewed

Relevant for

Quantum Software Engineer

Scope: IBM Quantum information and Qiskit current documentation; OpenQASM 3; QuTiP 5.4; Preskill notes; no-cloning and tomography source literature reviewed 2026-09-04.