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It's more difficult still given some of the contradictions and inconsistencies that obtain between quantum theory, which "was invented to explain why atoms are stable and do not instantly fall apart" but has little to say about space and time, and general relatively theory, which has everything to say about the big picture but tends to collapse when describing the behavior of atoms and their even smaller constituents. Whence the hero of Smolin's tale, the as-yet-incomplete quantum theory of gravity, which seeks to unify relativity and quantum theory--and, in the bargain, to move toward a "grand theory of everything." Smolin ably explains concepts that underlie quantum gravity, such as background independence, the superposition principle, and the notion of causal structure, and he traces the development of allied theories that have shaped modern physics and led to this new view of the universe.
Although he allows that "it has not been possible to test any of our new theories of quantum gravity experimentally," Smolin predicts that a solid framework will be established by 2015 at the outside. If he's correct, the years in between promise to be an exciting time for students of the physical sciences, and Smolin's book makes an engaging introduction to some of the big questions they'll be asking. --Gregory McNamee
Copyright 2001 Cahners Business Information, Inc.
This is a book that my husband wanted and I gave it as a gift to my husband. He says it's great!Published 13 days ago by Marie Habbick
Because there are already new theories evolved when this book is out, I still need to catch up with some other publications after finishing this book. Read morePublished 9 months ago by Vichraje
Lee takes your for a ride and enlightens you along way towards Quantum Gravity!Published 11 months ago by Jarmo Ken Koskinen
A vivid description of the road to a quantum theory of gravity without equations but a fully developed discussion of the road towards one. Read morePublished 12 months ago by Amazon Customer
"Three Roads to Quantum Gravity' is an excellent book for those looking to learn more about a potential alternative to string theories. Read morePublished 12 months ago by KG
Perhaps a bit optimistic in hindsight, but Mr. Smolin's ability to treat several different theories thoroughly and with respect makes this book an educating and enjoyable read.Published 14 months ago by SveinN
A very good explanation of the existing theories for quantum gravity.
Writen in a way to understand the concepts without entering in mathematical formulations. Read more