The Principles of Quantum Theory, From Planck's Quanta to the Higgs Boson

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This book delves into foundational thinking in quantum theory, emphasizing the significance of fundamental principles and the creative thinking that leads to new principles. It argues that this principle-based approach, though less common in contemporary discussions, is crucial for addressing key issues in quantum foundations and ongoing debates. The historical context shows how principle thinking has driven major breakthroughs, from old quantum theory to quantum mechanics and quantum field theory, which has been at the forefront of quantum developments. More recently, it has gained renewed importance in quantum information theory. By examining the contributions of key figures like Einstein, Bohr, Heisenberg, Schrödinger, and Dirac, the book provides a fresh perspective on the history and philosophy of quantum theory, extending from Planck’s quantum to the Higgs boson. It also explores the nature of quantum probability and introduces a new interpretation of quantum mechanics, termed “the statistical Copenhagen interpretation.” The argument is framed by Heisenberg’s “spirit of Copenhagen,” characterized by three significant separations from traditional physics: reality from realism, probability from causality, and locality from relativity, which together define the fundamental principles of quantum theory.