Veiled Reality An Analysis Of Present- Day Quantum Mechanical Concepts

By questioning the validity of some of our basic concepts, such as space, object, and causality, quantum physics contributes quite decisively to the dramatic changes now taking place in our world picture.This book is addressed not only to physicists at an early stage in their careers (the first or second year graduate student) but also to philosophers, as well as to all the senior physicists interested in the interpretation problem. Beginning with a chapter that could be described as ?philosophy for physicists,? it presents an in-depth analysis of present-day quantum mechanical concepts, an analysis of physicists and philosophers alike. Specifically, it first offers an extensive critical analysis of such topics as the Einstein, Podolsky, Rosen reality criterion, nonseparatability, the quantum measurement riddle, decoherence theory, consistent histories approaches and ontologically interpretable theories. All this then naturally leads to philosophical questions concerning, in particular, intersubjective agreement and the limit of realism. And a thorough examination of this whole material finally leads to the view that distinguishing between empirical reality and a veiled man-independent reality yields an acceptable answer to the perplexing question of how to interpret quantum physics. Veiled Reality offers nonspecialists, including students in physics, philosophy and the history of science, an accessible perspective on basic problems in the foundations of physics.

* Philosophy and Physics * Matter Waves, Superposition, Linearity * The Rules of Quantum Mechanics * Comments * Complements * The Density Matrix Formalism * Proper and Improper Mixtures * Quantum States and the Nonseparability Problem * The EPR Problem and Nonseparability * On Measurement * Variations on a Bohrian Theme * Quantum Mechanics as a Universal Theory, Classical Appearances in a Quantum World * Ontological Approaches (Hidden Variables and All That) * Open Realism * Veiled, Independent Reality, Empirical Reality * Lessons and Hints from Quantum Physics

Bernard D'espagnat