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The Black Hole War: My Battle with Stephen Hawking to Make the World Safe for Quantum Mechanics | 
 enlarge | Author: Leonard Susskind
Publisher: Back Bay Books
Category: Book
List Price: $15.99
Buy New: $10.87
You Save: $5.12 (32%)
Rating:  23 reviews
Sales Rank: 506949
Media: Paperback
Number Of Items: 1
Pages: 480
ISBN: 0316016411
Dewey Decimal Number: 520
EAN: 9780316016414
ASIN: 0316016411
Publication Date: July 22, 2009 (In 195 Days)
Shipping: Eligible for Super Saver Shipping
Availability: Not yet published
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Product Description
At the beginning of the 21st century, physics is being driven to very unfamiliar territory--the domain of the incredibly small and the incredibly heavy. The new world is a world in which both quantum mechanics and gravity are equally important. But mysteries remain. One of the biggest involved black holes. Famed physicist Stephen Hawking claimed that anything sucked in a black hole was lost forever. For three decades, Leonard Susskind and Hawking clashed over the answer to this problem. Finally, in 2004, Hawking conceded.
THE BLACK HOLE WAR will explain the mind-blowing science that finally won out, and the emergence of a new paradigm that argues the world--this catalog, your home, your breakfast, you--is actually a hologram projected from the edges of space.
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| Customer Reviews: Read 18 more reviews...
 Very interesting, at times taxing... January 6, 2009
1 out of 1 found this review helpful
This book explains well and understandably, why Prof. Hawking's view on black holes could not be entirely correct. Up to that point, I feel an interested layman who has had some exposure to physics (like me...)can follow the argument.
The way his argument leads to string theory still is intuitively comprehensible, or so I felt.
After that, it became obscure to me; however I do not think, this is Prof. Susskind's fault, but the subject matter simply becomes too counter - intuitive for all but the full-time-experts in this field.
This is certainly one of the better "popular science book" reporting on the edges of physics! ( e.g. the two books by Michio Kaku seem more like science fiction to me).
 Learn about Physics and Physicists December 26, 2008
0 out of 1 found this review helpful
Susskind has such a lucid mind that he can't help but reveal personal foibles while giving us a window into the way a truly scientific debate unfolds. It's fun to see how even super geniuses can stubbornly resist the results of their own insights. Einstein's intransigence about Quantum Dynamics, Hawkings' insistence that information is lost in black holes, and Susskind's obsession and rivalry with Hawkings. I loved this book (though most of the string theory was beyond me). It's fun to spend time with such minds and bask in the energy and optimism that comes from those who puzzle with the universe.
Surprisingly well done November 18, 2008
0 out of 1 found this review helpful
At first I was put off by the simplicity of the narative. Appeared and felt like a book on physics simply dumbed down -- but as I got further into the writing I found the writing style grew on me -- that this is an excellent writing on QM that is accessable to my nieces. L. Susskind is very thorough in his presentation, and after the first 100 pages or so, just paints an exciting picture that is very easy to follow, and, again, what is more impactful -- one simply WANTS to find out the "next step." OK -- Christmas gift for my nieces??
Black Holes November 16, 2008
7 out of 9 found this review helpful
The book discusses a problem. According to Hawking, when an object falls down a black hole (BH), all information is lost. The problem is that this violates a principle of physics that information is never lost. The future cannot lose track of the past, for then the past would cease to exist, as the only meaning to the past is present observations and records. Susskind proposes a solution that took him a decade to resolve, and he discusses this in the book. The solution is the Holographic Principle, which is that all the information inside the 3-dimensional sphere of the BH resides on the 2-dimensional surface. An object falling down a BH never crosses the surface, and so the information is not lost. There is a "dual description" that does not refer to the inside.
Susskind makes heavy use of String Theory to establish the theory. Actually, one can arrive at the same conclusion without the use of String Theory or quantum mechanics, by simply focusing on basic principles of physics and general relativity (GR). According to GR, it takes an object forever to reach the BH, and so it never gets inside. We therefore cannot speak about the inside. Everything falling down a BH is eternally falling, and so the information is not lost. We cannot speak about the inside of the BH. This then is exactly Susskind's Holographic Principle, where all information is outside the BH.
Science, and in particular physics, is a collection of theories. A theory is a mathematical system along with observational and experimental agreement. If it is impossible in principle to perform an observation, the theory cannot speak about that situation. Science also includes guesses, research proposals, and hypotheses, not all of which are theories.
The confusion arises from the formal existence of a solution of GR that from the viewpoint of the falling object, the object crosses the event horizon in finite time. However, since it is impossible in principle to observe an object "entering" the BH, this formal solution does not exist in reality.
If we accept the argument that something that a falling observer (someone who cannot return nor communicate with the rest of the world) can observe is considered as a valid scientific observation, we then lose our ability to criticize people for believing that the dead go to Heaven. The dead person (one who cannot return nor communicate with the rest of the world) observes Heaven. We scientists must be very careful about our scientific reasoning, and not give others the opportunity to twist it to make it sound as if we support religion, as is, unfortunately, often the case.
In summary, the principle of objective observation implies that no object can enter a BH.
Another point is that the formal solution of GR from the viewpoint of the falling observer is not a valid solution of GR. This is due to the proven existence of a singularity at the center. Since the object reaches the singularity in finite time, this solution is not valid. If we insist on accepting this formal solution, we get into paradoxes, as is usually the case when one accepts formal invalid solutions.
According to the Holographic Principle, no future theory can discuss the inside of a BH.
I gave four stars. The book makes excellent reading. It helps clarify some aspects of String Theory. For this, I give it three stars. His points about information residing outside the BH give it another star. I do not give it five stars, as his main point about where the information is can be proven by understanding and applying basic principles of science. We scientists and teachers must never lose sight of basic principles.
Susskind makes the common error of defining a BH as a place where light cannot escape, implying that the idea of an inside of a BH is a meaningful concept, contradicting his own Holographic Principle. A correct definition of a BH is a mass so large that objects falling towards it are time-dilated and red-shifted out of existence.
Another error in the book is mentioning "the 3-dimensional space inside the BH". The geometry is very much non-Euclidean. Approaching a BH is geometrically similar to moving eternally outwards to the "end" of the universe. Speaking about the inside of a BH is geometrically similar to speaking about space outside the universe, i.e., not meaningful.
General Relativity Meets Quantum Mechanics October 31, 2008
0 out of 1 found this review helpful
There is a lot of physics contained in this excellent book - modern, cutting-edge theoretical physics, that is. In 24 chapters and almost 450 pages, the author guides the reader through a maze of seemingly contradictory scientific arguments in order to resolve an important issue in the physics of black holes: whether information is forever lost to the universe after it has passed through a black hole's horizon. In essence, this involves a type of reconciliation between General Relativity and Quantum Mechanics. Although this involves very abstract and difficult-to-grasp concepts, the author, one of the main adversaries in this so-called black hole war, gently guides the reader through the various issues, starting from first principles right up to the cutting-edge subject at hand. The book is amply illustrated with many diagrams, drawings, figures and pictures in order to help further clarify the already-lucid descriptions that are given in the text. But, in addition to all the technical issues, the author has included much of the human element in this war. Interpersonal matters, many personal anecdotes, people's backgrounds and even the odd joke all contribute towards illustrating that the main theme of this book is a truly human endeavor: to understand a bit more about our universe. The writing style is clear, authoritative, friendly, even chatty and very engaging; the 450 pages fly by amazingly quickly. Although science buffs are likely to be those who will enjoy this book the most, the writing style is such that its contents are easily accessible to a much broader readership.
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