Quantum Physics: Illusion or Reality?

Be warned, this book assumes you know a little about quantum physics to begin with. It's not going to walk you through all the basics of the field. But for those who've had an introduction to the concepts of quantum physics, it's a great examination of the conceptual problems of quantum physics. Don't be fooled by its short length -- this is a book to be read slowly, re-read, an digested. The discussion of the EPR paradox and Bell's Theory is especially good, because it's more technical and mathematical than those in other intro books, and while therefore more difficult, it's also more rewarding.

A. Rae struggles with the conceptual and philosophical implications of quantum physics (qf).His book contains excellent explanations of the destruction of determinism, because uncertainty and indeteterminism are built into qf's very foundations. He also rejects the 'hidden variables' solution to solve qf's apparent contradictions. He shows also the fundamental opposition between Einstein and Bohr.Unfortunately, this book contains a comment on the out-of-date Popper-Eccles discussion on the body/mind problem and their statement that the mind is not subject to the laws of physics. This problem has been resolved (see V. Ramachandran's linguistic solution in 'Phantoms in the brain', or G. Edelman's 'A universe of consciousness').But I found certain flaws in the author's reasoning due mainly to the choice of bad examples.Firstly, let me state one fundamental specification: reality is a process, not a fact (L. Smolin).That is the reason why his ultimate question 'If reality is only what is observed ...' is not a good one.A qf measurement does not create the 'only' reality. Protons, electrons, dead or alive cats, DNA mutations exist, even if they are not observed. A qf measurement is part of the universal process. In qf we only measure complementarities (properties) as Bohr stated.Secondly, A. Rae states that macroscopic processes are irreversible (the second law of thermodynamics) and microscopic ones reversible.For reversibility he chooses as example the collision of two molecules. I doubt firmly that in our universe after the collision the molecules can (without an exterior intervention) go back to their initial states. Those interactions are 'theoretically' reversible.On the other hand, the life or death of a cat is a macroscopic event. The cat example is a good 'figure' to explain the qf theory, but it is a bad one to build a conceptual or philosophical theory on it. Nobody will calculate the outcome of a certain event based on a dead/alive scenario if a simple look at the cat's condition can eliminate 50% of the possibilities. The same goes for the DNA mutations.The theory of I. Prigogyne (his books are difficult) is certainly a step in the good direction. As reality is a process, indeterminism should also be the fundamental cornerstone for classical physics, but naturally not in our daily Euclidian life.In the case of the 'many worlds' question, I prefer Rudolf Peierls's solution where he proposes to speak of many world 'possibilities' (see P. Davies' 'The ghost in the atom').This is a thought-provoking book. Not to be missed.

It has only been once in a great while that a thin little tome has taught me so much, and been so much fun. Before Quantum Physics by Alastair Rae, the last one I remember was Richard Feynmann's QED. I now feel like I have at least a near understanding of Bell's Theorem, EPR, SQUIDS, and an assortment of things and concepts that were tantalizing but vague until now. Thank you, Alastair, you're a good teacher. And, the little surprise at the end, Prigogine's possible answer. I'd always found him intriguing. Now I know why.

I'm not a math physics person, but I enjoy learning what I can about them, which is why I purchased this book. I almost put it aside as I felt some of the first few pages were over my head, but I decided to look upon it as stretching exercises for the mind, and managed to reach a tolerable comprehension of the material. Thereafter the book was both understandable and thoroughly readible. I found intriguing the philosophical implications of quantum physics. Particularly interesting was the author's discussion of Popper and Eccles's concepts of the 3 worlds of reality: the world of objects, of the human mind and of the products of the human mind. The implication of human consciousness in cetain physical interactions and the possiblity that consciousness actually creates reality itself was the topic of several pages. The author also briefly touches upon artificial intelligence, multiple-world hypothesis, the effect of size on expected theoretical outcomes, and time and its direction. It was a thoroughly enjoyable book.

Bringing complex topics to a level where they can be understood by beginners is an art. Alastair Rae does just that, and should be congratulated for it. His chronological explanations of the basic Quantum Physics notions make you feel welcome in a field of Science otherwise perceived as closed to most novices.