"synopsis" may belong to another edition of this title.
* ""Light stopped."" So read a number of headlines over recent news articles, about scientists bringing light to a full stop in a laboratory. The more careful writers explained that actually the experiments consisted of capturing all the information about some light rays in a soup of atoms and laser beams; this information could be used to reassemble the rays later and send them on their way. ""The Bit and the Pendulum"" explores the possibility that everything, heaven and earth and all that is in them, is, like that light, but a manifestation of information. Physical scientists are likely to meet this idea with a dismissive shrug; they are quite happy with energy as the foundation of everything. On the other hand, information scientists are likely to find the idea quite natural and exciting. Tom Siegfried, the science editor of The Dallas Morning News, invites the general reader to come to a personal conclusion. Siegfried posits that science, particularly physics, and by extension the rational view of the universe, have been driven by a succession of metaphorical worldviews - ""superparadigms."" In turn, these are motivated by the dominant machines of the era. The first: The universe as clockwork (the pendulum of the title) is manifested in Newtonian mechanics. Here force is a key concept, and energy, kinetic and potential, first appears as a conserved quantity. The second, some centuries later: The universe as a large heat engine Is manifested in the theory of thermodynamics, motivated by the steam engine. Energy, the key concept, is conserved, but entropy, or useless heat energy, increases, so the universe is running down. The third, motivated by the computer, the dominant machine of today, sees the universe as a large information processor. Entropy is information.
Information has a precise definition as the state of a system. The simplest bit of information is an either-or state, a zero or one, up or down, yes or no, or a protein either active or inactive (this last connects biology and information). Any system - an atom, a human, the universe - can be completely described by the answers to a few tens of yes-no questions (20 questions, anyone?); that is, a few tens of bits. An information processor, a computer, is a system that transforms its state, according to rules, into a new state. Do not underestimate the import of all this. The thesis developed in the book is that information is not a formal way of analyzing systems and their behavior. ""Information is real. Information is physical,"" Siegfried writes. And later: ""Information is more than a metaphor -it is a new reality."" And the progression of events through time is computation, so the universe is essentially a huge. If mysterious, computer.
To illustrate, Siegfried begins with the idea of teleportation: ""Beam me up, Scotty."" If teleportation really exists - and Siegfried shows it does in some sense - it would consist of transporting not matter but the complete information about the structure of an object, every molecule of Captain Kirk, in such a way that the information in the previous location is destroyed. In this view of reality, Siegfried says, ""information is the ultimate 'substance' from which all things are made""; witness the light of the recent headlines.
This concept, at most a few decades old in this form, is controversial. Learned opinions vary from complete acceptance to laughing rejection. This book is personal journalism. The author has met with many of the principal movers and shakers. He lets them speak for themselves and recounts his own intellectual journey. He has attended the scientific meetings and read the scientific papers. His primary mentors seem to have been the physicist John Wheeler, a professor of his at the University of Texas, Austin, and the late Rolf Landauer of I.B.M., a primary figure in the physical theory of information (and a deep skeptic about some of the newer directions of exploration).
The book is not about
"An eager, ambitious book. A stimulating, accessible introduction to scientific theory."––Dallas Morning News "An enjoyably quick–paced interdisciplinary survey of the outer limits of scientific thought."––Kirkus Reviews
"Siegfried weaves a provocative and convincing argument. . . . Recommended for an informed audience."––Library Journal "An excellent introduction to the myriad small worlds that can be teased out of our big one."––Publishers Weekly
"A volume of remarkable sweep."––Booklist
Now in paperback, The Bit and the Pendulum explores the radical idea at the center of the new physics of information: everything in the universe, from the molecules in our bodies to the heart of a black hole, is made up of bits of information.Award–winning author Tom Siegfried interviews top scientists–all using "bits" to solve the seemingly unsolvable–and provides a highly accessible introduction to a fundamentally new way of seeing the world. Lively, engaging, and topical, The Bit and the Pendulum shows how the computer and the "bit" are revealing secrets of the brain, the nature of matter, and the workings of the universe.
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