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From Eternity to Here: The Quest for the Ultimate Theory of Time [Englisch] [Gebundene Ausgabe]

Sean Carroll
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Kurzbeschreibung

7. Januar 2010
A rising star in theoretical physics offers his awesome vision of our universe and beyond, all beginning with a simple question: Why does time move forward?

Time moves forward, not backward-everyone knows you can't unscramble an egg. In the hands of one of today's hottest young physicists, that simple fact of breakfast becomes a doorway to understanding the Big Bang, the universe, and other universes, too. In From Eternity to Here, Sean Carroll argues that the arrow of time, pointing resolutely from the past to the future, owes its existence to conditions before the Big Bang itself-a period modern cosmology of which Einstein never dreamed. Increasingly, though, physicists are going out into realms that make the theory of relativity seem like child's play. Carroll's scenario is not only elegant, it's laid out in the same easy-to- understand language that has made his group blog, Cosmic Variance, the most popular physics blog on the Net.

From Eternity to Here uses ideas at the cutting edge of theoretical physics to explore how properties of spacetime before the Big Bang can explain the flow of time we experience in our everyday lives. Carroll suggests that we live in a baby universe, part of a large family of universes in which many of our siblings experience an arrow of time running in the opposite direction. It's an ambitious, fascinating picture of the universe on an ultra-large scale, one that will captivate fans of popular physics blockbusters like Elegant Universe and A Brief History of Time.

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Produktinformation

  • Gebundene Ausgabe: 448 Seiten
  • Verlag: Dutton Adult (7. Januar 2010)
  • Sprache: Englisch
  • ISBN-10: 0525951334
  • ISBN-13: 978-0525951339
  • Vom Hersteller empfohlenes Alter: 17 - 17 Jahre
  • Größe und/oder Gewicht: 3,8 x 15,6 x 23,1 cm
  • Durchschnittliche Kundenbewertung: 4.3 von 5 Sternen  Alle Rezensionen anzeigen (3 Kundenrezensionen)
  • Amazon Bestseller-Rang: Nr. 184.709 in Fremdsprachige Bücher (Siehe Top 100 in Fremdsprachige Bücher)

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Produktbeschreibungen

Pressestimmen

"Unifying cosmology, thermodynamics, and information science into a refreshingly accessible whole, From Eternity to Here will make you wish time's arrow could fly in reverse, if only so you could once again read the book for the first time."
-Seed Magazine

"Carroll...takes his readers on a fascinating and refreshing trek through every known back alley and cul de sac of quantum mechanics, relativity, cosmology and theoretical physics. The best way to grasp the rich mysteries of our universe is by constantly rereading the best and clearest explanations. Mr. Carroll's From Eternity to Here is certainly one of them."
-Wall Street Journal

"For anyone who ever wondered about the nature of time and how it influences our universe, this book is a must read. It is beautifully written, lucid, and deep."
-Kip Thorne, Feynman Professor of Theoretical Physics at Caltech, author of Black Holes and Time Warps

"Sean Carroll's From Eternity to Here provides a wonderfully accessible account of some of the most profound mysteries of modern physics. While you may not agree with all his conclusions, you will find the discussion fascinating, and taken to much deeper levels than is normal in a work of popular science."
-Sir Roger Penrose, University of Oxford, author of The Road to Reality and The EMperor's New Mind

Über den Autor und weitere Mitwirkende

Sean Carroll, Ph.D., is a theoretical physicist at the California Institute of Technology. After receiving his doctorate from Harvard University, he pursued his research at the Massachusetts Institute of Technology, the Institute for Theoretical Physics in Santa Barbara, and the University of Chicago. He has published papers on dark matter and dark energy, the physics of extra dimensions, and alternative theories of gravity as well as the graduate-level textbook Spacetime and Geometry. Sean Carroll is one of the founders of the group blog cosmicvariance.com, named one of the five top science blogs by Nature.

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4.0 von 5 Sternen Besonders empfehlenswert!! 3. März 2010
Format:Gebundene Ausgabe
"Timeflow is an illusion, even if a very persistent one" A. Einstein
Und dieses Buch gibt eine physikalisch fundierte, psychologisch-kognitiv plausible Erklärung dafür und, in Erweiterung, für die ganze Entwicklung des Universums, intelligenter Lebewesen eingeschlossen.
Die Einführung in die allgemeine und spezielle Relativitätstheorie, sowie in die Grundlagen der Quantenmechanik verläuft zügig und konzentriert im Wesentlichen auf das Nötige für die angebotene Darstellung des Zeitpfeils.Dagegen wird sehr detalliert in die Thermodynamik eingegangen. Man muss mit allen o.g. Gebieten ein bisschen vertraut sein, um mitzukommen, also, es ist KEIN Buch zur Einführung.

Was den Kern dieses Buches betrifft, nämlich das Rätsel des Zeitpfeils, ist die Erklärung, basierend auf das Entropiegsetz sehr einleuchtend - sie liefert sogar einen neuen Rahmen für das bekannte Inflationsmodell, und wird schlüssig in die neuesten Erkenntisse der Kosmologie eingefügt. Es ist faszinierend, einzusehen, auf welche Weise dieses einfache Gesetz unter anderem das Vorhersehen der Zukunft ausschließt und die Erinnerungen nur auf die Vergegenheit begrenzt. (Sonst, wären ja "Erinnerung" und "Vorhersage" kognitiv eine und die selbe Funktion!)

Übrigens: in einem Unterkapitel wird auch mit dem Problem der Paradoxien bei Zeitreisen aufgeräumt: Paradoxien passieren einfach NICHT, egal ob entlang linearer oder zirkulärer Zeitlinien! So einfach ist es. Der Verlauf einer History ist und muss selbskonsistent bleiben.
Lesen Sie weiter... ›
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1 von 1 Kunden fanden die folgende Rezension hilfreich
5.0 von 5 Sternen Ein absolutes Highlight 1. März 2014
Von Lulu TOP 100 REZENSENT
Format:Taschenbuch
In Sean Carrolls Buch geht es vor allem um das Wesen der Zeit und den Zeitpfeil. Manches mag beim Lesen redundant wirken, weil der Autor den von ihm untersuchten Sachverhalt von allen möglichen Seiten aus betrachtet. Mir hat dies sehr geholfen. Ich kenne kein anderes populärwissenschaftliches Buch, dass sich in vergleichbarer Weise und Intensität (und auch im kritischen Denken) mit dem Zeitpfeil auseinandersetzt.

Hinzu kommt, dass Sean Carroll ganz hervorragend und auch witzig schreibt. Es war eine Freude, den Text zu lesen. Gefallen hat mir auch sein kritisches Denken: Er hinterfragt im Grunde alles, so wie es auch sein sollte.

Textproben (288):
"The right attitude toward any apparently surprising feature of the observed universe, such as the low early entropy or the small vacuum energy, is to treat it als a potential clue to a deeper understanding."

(345): "Sometimes, the condition 'your're not allowed to ask why' is rephrased as follows: 'We posit a new law of nature, which holds that the initial state of the universe had a very low entropy.'"

Von einer solchen Haltung sollten sich Darwinisten mal eine Scheibe abschneiden.

Die Sätze deuten aber auch an, warum es Carroll in seinem Buch unter anderem ganz wesentlich geht: Warum begann das Universum in einem Zustand sehr niedriger Entropie? Was sind die Gründe dafür? Lässt sich das erklären, oder müssen wir das einfach als Naturgesetz akzeptieren?

Mir hat das Buch zum Thema viel tiefere Einblicke in physikalische Zusammenhänge und das Denken der Physiker beschert als etwa Stephen Hawkings Die illustrierte Kurze Geschichte der Zeit.
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4.0 von 5 Sternen Peabody here and my boy Sherman 2. Juni 2010
Von bernie
Format:Gebundene Ausgabe
I have always likes contemporary science, history and the like. Not that new age claptrap about thinking particles, but the more current glossed over actual theories of today. If I wanted a more in-depth explanation, I could read the sources for this book.

The interest is in the speculation and it begs the question "What do you think." I do however get exposed to concepts there are overlooked in all the math behind most of the books on time and its various definitions.

Sean Carroll stakes a good balance between what we know and do not know and what we could know and cannot know.

I downloaded the first chapter on the Kindle (free) and it was worth reading to see what I was buying. I went ahead and bought the hardback. When the kindle enables Text-to-Speech, I will buy another copy, as it is a convent way to carry your library.

I can see where a few concepts were missed but it is not worth going into it in a review. What is in the book is well worth the read time. And then you have a great reference book for the library. I look forward to reading more books by Sean Carroll.

Oh did I forget to say that this book is about speculation on the meanings and understanding of "time."
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5.0 von 5 Sternen A captivating read on a deep and difficult topic 7. Januar 2010
Von A Cosmologist - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe
The arrow of time is a central issue in fundamental physics, and one that remains an open question even in the age of quantum mechanics and general relativity. It is a tall task even to define the question properly, never mind to explain what some of the proposed resolutions are. Nevertheless, Carroll is one of the best writers of popular science working today, and in this book he tackles the topic beautifully, guiding the reader through the relevant ideas, many of which we all think we have an intuitive feel for, like entropy, and explaining their physical meanings, and how gravity complicates the story.

The book is worth reading for its expert descriptions of the background material alone, but the reader hungry for speculations of how physics at the frontier may provide an understanding of the arrow of time will not be disappointed. Carroll devotes ample space to the concepts of cosmic inflation, the role of quantum mechanics, baby universes, and the setting that string theory may provide for all of this. None of this is settled ground in physics yet, and the author makes that entirely clear. But it hard to read this account and not come away with a tangible sense of the excitement to be found in taking on these most fundamental of problems.
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5.0 von 5 Sternen Time in the eternity of the multiverse 21. März 2010
Von Jaume Puigbo Vila - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe|Verifizierter Kauf
This is a wonderful book that would merit a second reading to understand it more fully. At a fundamental level physics consists of the Standard Model, General Relativity and the Big Bang Inflationary Model of the universe. However, in this model there is something unexplained and it is the Past Hypothesis, that is that the universe started in a low entropy configuration. However the author speculates that perhaps the Big Bang was neither the beginning of time nor a moment of low entropy, but a moment of lowest entropy and the entropy increases in both directions of time, towards the future of the Big Bang and towards its past (from our point of view). This would be the situation in a single connected universe, although string theory predicts a multiverse.

Trying to elucidate the meaning of time (perhaps "an emergent phenomenon rather than a necessary part of our ultimate description of the world") the author reviews special and general relativity, Boltzmann's entropy, black holes and the controversy about conservation of information, life, quantum mechanics, inflation and the multiverse. Generally speaking the book is written in an accessible style (eggs can be broken and turned into omelettes, but not the other way around to describe the Second Law), but you will need to reread some parts to make the most of it.

In the final chapter Sean Carroll faces the "search for meaning in a preposterous universe". I quote: "We find ourselves, not as a central player in the life of the cosmos, but as a tiny epiphenomenon, flourishing for a brief moment as we ride a wave of increasing entropy...Purpose and meaning are not to be found in the laws of nature, or in the plans of any external agent...it is our job to create them. One of those purposes -among many- stems from our urge to explain the world around us the best we can. If our lives are brief and undirected, at least we can take pride in our mutual courage as we struggle to understand things much greater than ourselves". I think he has a point. It is in our human nature to try to find meaning to things. The universe is meaningless. I agree and I think that Woody Allen would also.
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5.0 von 5 Sternen Genius for non-geniuses! 7. Januar 2010
Von David Grae - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe
I am not a physicist. I majored in English in college. I shouldn't be able to understand this book on any level. But I do. And it's fascinating. Illuminating. And just plain interesting as hell. That's Sean Carroll's greatest achievement in this page-turner about the TIME we live in. If you have any interest at all in getting your head around just what this elusive "time" we all experience is all about, you should read this book.
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4.0 von 5 Sternen Time, Entropy, and all that 3. Mai 2011
Von Glenn McDavid - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe|Verifizierter Kauf
Roughly the first 3/4 of the book is quite standard physics, and a few related fields, e.g. information theory. The last few chapters, where the author, Sean Carroll, suggests a possible answer to the puzzle, are much more speculative, something he makes very clear.

To me the book was quite interesting. A few equations are displayed, but there is no actual use of mathematics. I have an M.S. in Applied Physics, so I cannot really say how a reader with no technical background would cope with it. Carroll goes through a lot of material, and the sheer quantity of it might be overwhelming. Unfortunately, that is just the way things are. Nobody is going to cope with this without the willingness to do some hard thinking. Carroll does include a lot of pop culture references that readers can relate to, although one of those may not be in any future edition of the book.

A couple interesting (to me) notes:

The complexity of the universe is different from the entropy. Just after the Big Bang the universe was very simple--the same high energy subatomic soup every where. Right now the universe is very complicated: There are lots of galaxies, stars, planets, black holes, people, etc. However, the entropy of the universe has increased: The formation of all those objects is mostly due to gravitation, as matter coalesces together. This gravitational process increases the total entropy, more than offsetting the order in all the structure. Eventually all of this structure will fade away. Even black holes will decay by the Hawking process, leaving a very thin, cold, dark, and simple universe. So while the universe started in a simple state, evolved into a complex state, and will eventually decay into another simple state, the entropy is always increasing. See pages 199-201.

Long ago, as an undergraduate at Carleton, one of my professors talked about the total energy of the universe. The gravitational potential energy V between two bodies decreases as they approach, because gravitation is attractive. For computational purposes we usally set V = 0 when the distance between them is infinite, and he argued that this is the natural thing to do. Then the gravitational energy is always negative. Assuming a finite universe, you can add up all the positive energy of mass, kinetic energy, etc. and then offset it by the negative gravitational energy. Professor Titus suggested the total energy of the universe would be zero. Carroll mentions in passing that you can prove this in general relativity. See p. 358.

Now the universe appears to be infinite (this was not so clear back in 1972), so strictly speaking you cannot speak about its total energy. But the general concept still applies: Gravitational energy is still negative. Something can be created from nothing, if the something is offset by sufficient gravitational energy.

The whole book reminded me of what Sir Arthur Eddington wrote:

"The law that entropy always increases holds, I think, the supreme position among the laws of Nature. If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations--then so much the worse for Maxwell's equations. If it is found to be contradicted by observation--well these experimentalists do bungle things sometimes. But if your theory is found to be against the second law of thermodynamics I can give you no hope; there is nothing for it but to collapse in deepest humiliation."

On a lighter note, all of this talk about time and the universe also made me think of Severn Darden's
_Metaphysics Lecture_, which begins:

"Now, why, you will ask me, have I chosen to speak on the Universe rather than some other topic. Well, it's very simple, heh. There isn't anything else!"
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3.0 von 5 Sternen Another Well Written Book That Goes Nowhere 20. April 2010
Von Goldry Bluzco - Veröffentlicht auf Amazon.com
Format:Gebundene Ausgabe|Verifizierter Kauf
After reading Mr. Carroll's book, I am reminded of a conversation that supposedly occurred between an old Indian and a white man in the late 1800s. The white man was trying to impress upon the Indian how much more advanced white civilization was when compared to his. He drew a small circle in the sand and said, "This is what the Indian knows." He then drew a larger circle around the first one and said, "And this is what the white man knows." The old Indian thought about this for a moment and then proceeded to trace a much larger circle around this second circle and said, "And this is what the white man does not know." This is how I feel about the current state of theoretical physics and cosmology. There are more questions than answers. At the end of this book I came away with a feeling of profound futility. I lost count of how many times Carroll said something like, "More research needs to be done." or "We don't know the answer yet." or "It's a complete mystery." Every book of this type that I've read in the last ten years ends at the same place -- we're stuck and none of the current theories we have adequately explain any of the fundamental questions about the nature or origin of the universe. String theory? It could be correct, but there is no way to prove it one way or another. Is the universe comprised of 11 dimensions? Possibly. The jury is still out. Does time exist? Yes, but it may also be an illusion. Parallel universes? Very likely. But, we may never know for sure. Is time travel possible? In theory yes, but the universe doesn't seem to like it, so it may never be technologically feasible. How about quantum entanglement, is this a real effect or does it signify some deeper, hidden property of the universe, or is it more like Bohm's guide wave interpretation? Everybody seems to have a different view. Sometimes things seem to come down to personal likes or dislikes. Did the universe have a beginning or has it always existed? Was there a Big Bang or was there a phase state shift? Bump and grind branes anyone?

I think I've reached the point where I'll just stop reading this sort of book for the next ten years. Carroll and others of his ilk are clearly very bright people with a grasp of advanced mathematics that puts me to shame (college calculus was as far as I got), yet despite their intellectual accomplishments they have nothing new to say on these subjects at the moment. Apart from selling books and making a buck, I really wonder why we need more books like this. Until some new breakthroughs come along I'll bide my time and just hope I live long enough to know what dark matter and dark energy are.
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