Quantum Mechanics: Probability and Measurement

This lecture delves into the concept of probability in Quantum Mechanics, exploring the question of why observers perceive specific outcomes. Starting with the classical measurement chain, the instructor discusses the non-deterministic reduction of the wave function and the role of consciousness in quantum theory. The lecture reviews classical probability theory and transitions into the analysis of infinite sequences of coin flips to illustrate the concept of randomness. The definiteness operator is introduced to explain how observers perceive outcomes. The discussion extends to the interaction between electrons, measuring devices, and observers, highlighting the deterministic nature of quantum mechanics. The lecture concludes with a reflection on the implications of Zurek's question and the deterministic evolution according to Schrödinger's Equation.