In the third episode of Quantum Consciousness, Justin Riddle discusses three principles of quantum mechanics and how they relate to the three-world model. First, the measurement principle describes how a wave-function is reduced into a discrete physical state. Second, the superposition principles reveals that a system enters into a probability distribution of multiple states between measurements. Finally, the entanglement principle suggests that when quantum systems that share a mixed superposition are separated in space, their wave-functions are inextricably connected. To illustrate these principles in action, the double-slit experiment is presented, superfluids & superconductors are explored, and the Einstein-Podolsky-Rosen paradox is discussed.