First published in 1993, _Quantum Theory Concepts and Methods,_ aims to offer an introduction to quantum mechanics that's centered on explaining the meaning behind the fundamental aspects of quantum mechanics. One way this is done is by defining quantum theory as a study of "preparations" and "tests" of physical system as opposed to centering the discussion around "operators" and "vectors" and showing how they map onto physical systems. Although this is largely an introduction to quantum mechanics, it is aimed at _graduate students studying physics._ However, the focus of this text are topics that may be considered part of the [foundations of quantum mechanics](Interpretations%20and%20Foundations%20of%20Quantum%20Mechanics%20(index).md) rather than the full range of topics likely to be part of a graduate level course in quantum mechanics. Nonetheless this text does assume familiarity with advanced topics pertaining to abstract mathematical objects used to describe quantum systems. A large portion of this text is dedicated to discussing _hidden variable_ theories, referred to here as _cryptodeterministic theories._ These topics are normally not included in courses in quantum mechanics and are largely the purview of "foundations" research. **Prerequisites:** * Linear Algebra 2^[Here we refer to a 2nd course in linear algebra that examines the subject with an emphasis on linear operators and vector spaces.] * Quantum Mechanics 1^[Here we refer to a 1st course in quantum mechanics based on operators and state vectors on Hilbert spaces. This course is typically taken by 3rd year students at American universities, following a sequences of courses introducing modern physics (including a more elementary look at quantum mechanics in terms of wave functions), thermodynamics, optics, classical mechanics, and classical electrostatics.] %20-%20libgen.lc.pdf) # Table of Contents  #Literature/Physics #Literature/Textbooks