Module 2 in the Quantum Computing: A Complete Learning Path series on malcolmlow.com . Following our Introduction to Qubits and Superposition (Module 1), this guide establishes the 3D geometric intuition for single-qubit quantum states and rotations before moving to Two-Qubit Entanglement (Module 3). Every single-qubit quantum state lives on the surface of a unit sphere in three-dimensional Euclidean space: the Bloch sphere . While classical bits are confined to discrete binary val...