Showing posts with label quantum mechanics. Show all posts
Showing posts with label quantum mechanics. Show all posts

Saturday, March 19, 2022

My Amazon Review of Ananyo Bhattacharya's "The Man From the Future: The Visionary Life of John von Neumann"

 

Genius

 

Something was in the water in fin de siècle Budapest. Out of that community came Nobel Laureates in physics Edward Teller, Eugene Wigner and Leo Szilard, the rocket pioneer Theodore von Karman, and the subject of Ananyo Bhattacharya biography John von Neumann. I would note that the book is more a biography of von Neumann’s ideas rather than a full biography of his life.

 

Von Neumann was born into a very upper-middle class Jewish family in Budapest, Hungary in 1903. He was a child prodigy from the beginning and received his math Ph.D. before he was twenty. The then studied engineering and before he was thirty, he authored "Mathematical Foundations of Quantum Mechanics” which integrated Heisenberg’s matrices with Schrodinger’s waves, a monumental accomplishment.

 

But that was only the beginning. He developed Minimax theory and at the Army’s Ballistic Research Lab he became an expert at the trajectory of artillery shells. That led him to the Manhattan Project at Los Alamos where developed the implosion lens necessary for the creation of the Atomic Bomb. He also conceived of stored program computer which had yet to be invented. Indeed, his second wife Klara was among the very first computer programmers.

 

Along the way he coauthored with Oskar Morgenstern “The Theory of Games and Economic Behavior” which revolutionized economics and was found to be very useful in business and war strategies, especially concerning the use of nuclear weapons. After World War II he divided his time among Princeton’s Institute for Advanced Study, Los Alamos’ Weapons Lab, and the Rand Corporation in Santa Monica, California.

 

While at Rand he instrumental in the development of ICBM’s and he came up with the idea of self-replicating computers. In essence he was the progenitor of artificial intelligence.

 

Bhattacharya tells the story of a true genus who also loved to party hard. My one criticism is that several of the science and math parts of the book can be a real slog for the lay reader.

 


The full Amazon URL is at: Genius (amazon.com)

Tuesday, September 14, 2021

My Amazon Review of Carlo Rovelli's "Helgoland: Making Sense of the Quantum Revolution"

 

The Philosophy of Quanta

 

Physicist Carlo Rovelli has offered up his philosophical review of the quantum revolution largely through the eyes of Werner Heisenberg. We see the 23-year-old Heisenberg in 1925 on the barren North Sea Island of Helgoland where he develops probabilistic matrix equations that explains the movement of electrons. Rovelli takes it one step further where in the physics of small particles everything is relational. That harks back to Einstein’s 1905 Theory of Special Relativity.

 

Heisenberg is challenged by a wave theory authored by Erwin Schrodinger which eventually fall by the wayside. His discussion of Schrodinger’s famous cat thought experiment is, to my mind, is marred by him viewing the cat has asleep or awake, when in fact Schrodinger was discussing whether or not his cat was dead or alive.

 

In the book we meet the great physicists of that age, Plank, Bohr, Dirac and Born. Where Rovelli loses me is where veers off into a host of philosophical notion to explain the interdependence of all objects. Nevertheless, you get a sense of the importance of Heisenberg did on Helgoland in 1925 and that underpins much of modern electronics today.


For the full Amazon Review see: The Philosophy of Quanta (amazon.com)

Monday, November 23, 2015

My Amazon Review of Paul Halpern's "Einstein's Dice and Schrodinger's Cat: How Two Great Minds Battled Quantum Randomness to Create a Unified Theory of Physics

Not Physics for Dummies

Physicist Paul Halpern has written and interesting and difficult book about the lives and theories of two of the greatest physicists of the 20th century. His discussion about the lives and philosophies of Einstein and Schrodinger is fascinating. This is especially true when he discusses Einstein’s deity in the context of Baruch Spinoza which leads him to believe that science is deterministic and not probabilistic. Hence Einstein’s aphorism that God does not play dice with the universe.  He also goes into great detail about Schrodinger’s very active sex life with more than a few women all the while being married. He spends more time on this than Schrodinger’s famous cat that is half dead and half alive.

At least for me, where he makes it difficult for the lay reader is his discussion of the science of Einstein and Schrodinger. Before reading this book I would suggest that the lay reader become very acquainted with the equivalent of “quantum mechanics for dummies,” “relativity for dummies,” and “unified field theory” for dummies.” Alas with only one course of college level physics there were many parts of this book where I was lost. The book needs clearer examples of the theories and diagrams would be of great help.


Finally his title is somewhat of a misnomer. Neither Einstein nor Schrodinger, try as they might, never arrived at a unified theory of physics. Even today’s standard model which Halpern acknowledges does not account for the role of gravity while accounting for electromagnetism and weak and strong forces of nuclear interaction. With that last sentence I am way over my head.

For the full Amazon URL see: