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Monday, February 13, 2006

Reading List: Warped Passages

Randall, Lisa. Warped Passages. New York: Ecco, 2005. ISBN 0-06-053108-8.
The author is one of most prominent theoretical physicists working today, known primarily for her work on multi-dimensional “braneworld” models for particle physics and gravitation. With Raman Sundrum, she created the Randall-Sundrum models, the papers describing which are among the most highly cited in contemporary physics. In this book, aimed at a popular audience, she explores the revolution in theoretical physics which extra dimensional models have sparked since 1999, finally uniting string theorists, model builders, and experimenters in the expectation of finding signatures of new physics when the Large Hadron Collider (LHC) comes on stream at CERN in 2007.

The excitement among physicists is palpable: there is now reason to believe that the unification of all the forces of physics, including gravity, may not lie forever out of reach at the Planck energy, but somewhere in the TeV range—which will be accessible at the LHC. This book attempts to communicate that excitement to the intelligent layman and, sadly, falls somewhat short of the mark. The problem, in a nutshell, is that while the author is a formidable physicist, she is not, at least at this point in her career, a particularly talented populariser of science. In this book she has undertaken an extremely ambitious task, since laying the groundwork for braneworld models requires recapitulating most of twentieth century physics, including special and general relativity, quantum mechanics, particle physics and the standard model, and the rudiments of string theory. All of this results in a 500 page volume where we don't really get to the new stuff until about page 300. Now, this problem is generic to physics popularisations, but many others have handled it much better; Randall seems compelled to invent an off-the-wall analogy for every single technical item she describes, even when the description itself would be crystal clear to a reader encountering the material for the first time. You almost start to cringe—after every paragraph or two about actual physics, you know there's one coming about water sprinklers, ducks on a pond, bureaucrats shuffling paper, artists mixing paint, drivers and speed traps, and a host of others. There are also far too few illustrations in the chapters describing relativity and quantum mechanics; Isaac Asimov used to consider it a matter of pride to explain things in words rather than using a diagram, but Randall is (as yet) neither the wordsmith nor the explainer that Asimov was, but then who is?

There is a lot to like here, and I know of no other popular source which so clearly explains what may be discovered when the LHC fires up next year. Readers familiar with modern physics might check this book out of the library or borrow a copy from a friend and start reading at chapter 15, or maybe chapter 12 if you aren't up on the hierarchy problem in the standard model. This is a book which could have greatly benefited from a co-author with experience in science popularisation: Randall's technical writing (for example, her chapter in the Wheeler 90th birthday festschrift) is a model of clarity and concision; perhaps with more experience she'll get a better handle on communicating to a general audience.

Posted at February 13, 2006 00:11