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L' universo elegante: superstringhe,…

L' universo elegante: superstringhe, dimensioni nascoste e la ricerca… (1999)

by Brian Greene

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Title:L' universo elegante: superstringhe, dimensioni nascoste e la ricerca della teoria ultima
Authors:Brian Greene
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The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory by Brian Greene (1999)



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Showing 1-5 of 57 (next | show all)
Brian Greene has a knack for image and metaphor, which makes his explanations of superstring theory and symmetry (not the same as what we learned in Geometry class in 10th grade) almost deceptively comprehensible. An enjoyable read (that I admittedly have yet to finish) it provides a comprehensive view of the state of string theory as it existed 7 years ago. There are major books out there right now that question the viability of string theory, so if you're looking for the *most* up-to-date information on what's been going on in physics, this is not the book to read. But it is a *great* place to start for the armchair physicist who wants to learn the definitions of the Strong Force, the Weak Force, and Electromagnetism, among other things. It's descriptions of mass and space will stretch the limits of your imagination... and in general, if you *can* imagine the things that Greene describes, chances are, you're a genius who can see in more than three dimensions. Lucky you! ( )
  anna_hiller | Jun 22, 2016 |
The only reason I give this 3 stars instead of 4 is because the description of relativity and QM in this is worse than in his 'Fabric of the Cosmos', and I'm not sure why they're included at all when they are already in the other book... ( )
  AlienIndie | May 20, 2016 |
tmi! ( )
  Rob3rt | Mar 3, 2016 |
Some parts are extremely interesting, the rest of it probably would be if I understood/cared more. There is a great explanation of relativity towards the beginning that I think most people would find intriguing. ( )
  JaredChristopherson | Nov 16, 2015 |
Well-written, fascinating look at the development of special and general relativity—and the omissions that are driving theoretical research ever since. HOWEVER, and this is a huge caveat, most of the book may be chronicling a misfire. (Lee Smolin's book THE TROUBLE WITH PHYSICS makes a good case for String Theory's failures; I'm about to re-read it to refresh my memory, so I can't go into too much detail yet.)

Greene's storytelling is certainly seductive, but a lot of String Theory's appeal is getting the same results as other theories, but in a more elegant fashion. This is a good thing because it means the theory avoids being outright wrong, but makes it difficult to find results that'll uniquely support strings, and not just the mass of other popular theories.

More troublingly, the experimental evidence that might support strings or these other theories simply isn't showing up. The Large Hadron Collider found the Higgs Boson, but has yet to uncover ANY signs of supersymmetry—the linchpin of string theory and other popular proposals. Oops. Of course, there are always other variants that hold out the hope that supersymmetric partners are just higher mass and harder to reach, but constant tweaking and adjustment kinda undermines the original claims to elegance!

When the book is standing on firmer ground, it's marvelous; Greene is a fantastic writer and explainer. But as an argument for String Theory? Reader beware. ( )
1 vote gregorybrown | Oct 18, 2015 |
Showing 1-5 of 57 (next | show all)
In the great tradition of physicists writing for the masses, ''The Elegant Universe'' sets a standard that will be hard to beat.
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To my mother and the memory of my father, with love and gratitude
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During the last thirty years of his life, Albert Einstein sought relentlessly for a so-called unified field theory—a theory capable of describing nature's forces within a single, all-encompassing, coherent framework.
Calling it a cover-up would be far too dramatic.
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I fisici e i matematici di tutto il mondo stanno in questi anni febbrilmente lavorando a una delle più ambiziose teorie che mai siano state concepite: la teoria delle superstringhe, o delle stringhe, come viene spesso chiamata. Einstein ricercò per più di trent'anni senza mai raggiungerla una teoria unificata, che riconciliasse la relatività generale e la meccanica quantistica, i due capisaldi della fisica del Novecento. La teoria delle stringhe fornisce forse la soluzione a questo problema profondo e affascinante, descrivendo tutte le forze della natura in un unico quadro concettuale di suprema eleganza. 
Tutto quanto di meraviglioso avviene nell'universo è il risultato delle vibrazioni di singole unità, ultramicroscopiche stringhe nascoste nella profondità della materia. I 'modi di vibrazione', le 'note' intonate da queste stringhe, determinano la costituzione intima della materia, come corde di violino che eseguono una sinfonia cosmica ordinata e armoniosa. 
In questo libro, Brian Greene ci narra la storia di una straordinaria avventura, parlandone da protagonista e trasmettendoci tutto l'entusiasmo della scoperta scientifica. La rivoluzionaria visione dell'universo che emerge dal suo racconto prevede dimensioni nascoste e arrotolate nele pieghe dello spazio, buchi neri che si trasformano in particelle elementari, discontinuità nella tessitura dello spaziotempo e universi che generano altri universi. 
"L'universo elegante" descrive con intelligenza e vivacità le scoperte esaltanti e i misteri ancora insoluti dell'universo. Attraverso l'uso sapiente di analogie e di metafore affascinanti, Greene riesce a rendere immediatamente accessibili alcuni dei più complessi e sofisticati concetti della fisica contemporanea.
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Amazon.com Amazon.com Review (ISBN 0375708111, Paperback)

There is an ill-concealed skeleton in the closet of physics: "As they are currently formulated, general relativity and quantum mechanics cannot both be right." Each is exceedingly accurate in its field: general relativity explains the behavior of the universe at large scales, while quantum mechanics describes the behavior of subatomic particles. Yet the theories collide horribly under extreme conditions such as black holes or times close to the big bang. Brian Greene, a specialist in quantum field theory, believes that the two pillars of physics can be reconciled in superstring theory, a theory of everything.

Superstring theory has been called "a part of 21st-century physics that fell by chance into the 20th century." In other words, it isn't all worked out yet. Despite the uncertainties--"string theorists work to find approximate solutions to approximate equations"--Greene gives a tour of string theory solid enough to satisfy the scientifically literate.

Though Ed Witten of the Institute for Advanced Study is in many ways the human hero of The Elegant Universe, it is not a human-side-of-physics story. Greene's focus throughout is the science, and he gives the nonspecialist at least an illusion of understanding--or the sense of knowing what it is that you don't know. And that is traditionally the first step on the road to knowledge. --Mary Ellen Curtin

(retrieved from Amazon Thu, 12 Mar 2015 18:16:03 -0400)

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Discusses the author's theory for all matter in the universe known as the string theory.

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W.W. Norton

2 editions of this book were published by W.W. Norton.

Editions: 0393058581, 039333810X

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