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Visual Quantum |

This is an online book that explains quantum field theory (QFT, an advanced version of quantum mechanics) at an introductory level. It uses lots of pictures and animations to *show* these otherwise-abstract concepts.

Some sections are written at a college sophomore level, and others at a first-year graduate level (see "How To Use This Book"). The book uses a "toy model" that allows pictures to be made of many of the most difficult ideas. Note that this teaching technique is unique, but that the concepts are well-established standard material that all physicists would benefit from knowing.

Table of Contents:

- How to use this book Elementary/advanced sections and animations.
- Introduction What a field is, classically and quantum mechanically.
- Two-particle quantum mechanics Multi-particle Schrodinger equation, entanglement.
- 1D approximation Discrete approximation to a field.
- 1D quantum field Quantize high-dimensional system, normal modes.
- Particles and fields Complmentary properties of a field.
- Special states Wave packets, superpositions, squeezed states.
- Interacting fields Classical and quantum model for two 1D fields with interaction.
- Bound states How interaction can lead to bound states.
- Measurement A specific interaction and its consequences.
- Decoherence Solution to the Schrodinger's cat paradox, but all of quantum mysteries.

Scott Johnson, 2009