Recent Physics Theory Solves Paradoxes

By Rodney Brooks

For one hundred years, most people have found it impossible to understand physics. Examples include Joseph Heller (“writhing in an exasperating quandary over quantum mechanics”), Bill Clinton (“I hope I can finally understand physics before I leave the earth”, Richard Feynman (“One had to lose one’s common sense”), and even Albert Einstein (“fifty years of pondering have not brought me any closer to answering the question, what are light quanta?).

Julian Schwinger’s Insight to Physics

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And yet, there is a theory that makes perfect sense and can be understood by any person. This concept, with roots in the 1930s, was ultimately developed by Julian Schwinger, who once had been called “the heir-apparent to Einstein’s mantle”. This accomplishment happened a number of years after Schwinger had already achieved physics fame for solving the “renormalization” problem, defined by the NY Times as “the most important development in the last 20 years” and was duly awarded the Nobel prize.

Still for Schwinger this was not good enough. He believed that Quantum Field Theory, as it stood then, was still lacking. His objective was to feature matter fields and force fields on an equivalent basis. After several years of hard work, he distributed a collection of five papers called “The theory of quantized fields” in 1951-54.

Physicists have been combating a particles-vs.-fields battle for over 100 years. There have been 3 “rounds”, starting when Einstein’s concept of light as a particle (called photon) triumphed over Maxwell’s belief that light is a field. Round 2 happened when Schrödinger’s hope for a field theory of matter was overcome by the particle-like behavior that physicists could not ignore. And round 3 took place when Schwinger’s field-based solution of renormalization was usurped by Feynman’s easier-to-use particle based approach.

For that reason, and others, Schwinger’s final development of Quantum Field Theory, which he regarded as far more noteworthy than his Nobel prize work, has been sadly ignored, and is indeed not known to most physicists– and to all of the general public.

Fortunately there are signs that QFT, in the true Schwingerian sense is reemerging, so in this sense it is a “new” theory There have been numerous books and articles, such as “The Lightness of Being” by Nobel laureate Frank Wilczek, “There are no particles, there are only fields” by Art Hobson, and “Fields of Color- The theory that escaped Einstein” by Rodney Brooks. The last one explains QFT to a lay reader, without any equations, and shows how this terrific “new” theory” resolves the paradoxes of Relativity, Quantum Mechanics and physics that have confused so many people.

Discover more here!

 

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GRAVITATIONAL WAVES REVEALED

By Rodney A. Brooks
author of “Fields of Color: The Theory That Escaped Einstein”.

The recent discovery of gravitational waves at LIGO (Laser Interferometer Gravitational-Wave Observatory) has captured the mind of the public. It will stand as one of the great accomplishments of experimental physics, in addition to the famous Michelson-Morley experiment of 1887 which it resembles. In fact by comparing these two experiments, you will see that understanding gravitational waves is not as difficult as you believe.

Contraction. Michaelson and Morley measured the speed of light at different times as the earth moved around its orbit. To their – and everyone’s – surprise, the speed turned out to be continuous, separate of the earth’s motion. This breakthrough caused great consternation until George FitzGerald and Hendrick Lorentz came up with the sole feasible explanation: objects in motion compress. Einstein then showed that this contraction is a consequence of his Principles of Relativity, but without saying why they contract (other than a need to conform to his Principles). In fact Lorentz had previously provided a partial explanation by showing that motion affects the way the electromagnetic field interacts with charges, causing objects to contract. However it wasn’t until Quantum Field Theory came along that a full explanation was found. In QFT, at least in Julian Schwinger’s model, everything is made of fields, even space itself, and motion affects the way all fields interact.

Waves. Electromagnetic waves, e.g., radio waves, have long been recognized and accepted as a natural phenomenon of fields. Now in QFT gravity is a field and, just as an oscillating electron in an antenna sends out radio waves, so a substantial mass moving back and forth will send out gravitational waves. But it didn’t take QFT to show this. Einstein also believed that gravity is a field that obeys his equations, just as the EM field obeys the equations of James Maxwell. In fact gravitational waves have been accepted by many physicists, from Einstein on down, who see gravity as a field.

Curvature. But what about “curvature of space-time”, which many people today say is what produces gravity? You may be shocked to learn that’s not how Einstein saw it. He believed that the gravitational field triggers things, even space itself, to contract, comparable to the way motion causes contraction. In fact Einstein used this analogy to show the correlation between motion-induced and gravity-induced contraction: they both affect the way fields work together. It is this gravity-induced contraction that is sometimes knowned as “curvature”.

Evidence. The first detection of gravitational waves was done at LIGO, using an apparatus similar to Michelson’s and Morley’s. In both experiments the time for light to travel along two perpendicular paths was examined, but because the gravitational field is much weaker than the EM field, the distances in the LIGO apparatus are much greater (miles instead of inches). Another difference is that while Michelson, not knowing about motion-induced contraction, anticipated to see a shift (and found none), the LIGO staff used the known gravity-induced contraction to view an alteration when a gravitational wave passed through.

Fields of Color: The theory that escaped Einstein explains Quantum Field Theory to a lay audience, without any math. If you want to learn more about gravitational waves or about how QFT resolves the paradoxes of Relativity and Quantum Mechanics, read Chapters 1 and 2, which can be seen free at http://quantum-field-theory.net.

Learn more here!