## Beyond Measure: Modern Physics, Philosophy and the Meaning of Quantum Theory

Jim Baggott looks at the history and philosophy of quantum mechanics and the continuing experimental search for meaning. Suitable for undergradate students of chemistry and physics.

Quantum theory is one the most important and successful theories of modern physical science. It has been estimated that its principles form the basis for about 30 per cent of the world’s manufacturing economy. This is all the more remarkable because quantum theory is a theory that nobody understands. *Beyond Measure* introduces science students to the theory’s fundamental conceptual and philosophical problems, and the basis of its non-understandability. It does this with the barest minimum of jargon and very little mathematics in the main text. Readers wishing to delve more deeply into the theory’s mathematical subtleties can do so in an extended series of appendices. The book brings the reader up to date with the results of new experimental tests of quantum weirdness and reviews the latest thinking on alternative interpretations, the frontiers of quantum cosmology, quantum gravity and potential application of this weirdness in computing, cryptography and teleportation.

After more than 30 years of sophisticated experiment tests, the standard quantum formalism emerges largely unscathed, only serving to reinforce the point that the theory remains the most powerful framework for explaining observations of the quantum world, but that its orthodox interpretation continues to offer little in the way of understanding in terms of underlying physical processes. Quantum theory remains a mysterious theoretical black top hat from which white rabbits continue to be pulled. Students are usually advised not to ask how this particular conjuring trick is done.

- Oxford University Press (2004)
- Translations:
**Simplified Chinese**