Communion Of Dreams


The shape of things to come.

From Chapter 3 of Communion of Dreams:

Apparent Gravity was the third major application of the theories set forth in Hawking’s Conundrum, the great opus of Stephen Hawking which was not published until after his death in the earlier part of the century. He hadn’t released the work because evidently even he couldn’t really believe that it made any sense. It was, essentially, both too simple and too complex. And since he had died just shortly before the Fire-flu, with the chaos that brought, there had been a lag in his theory being fully understood and starting to be applied.

But it did account for all the established data, including much of the stuff that seemed valid but didn’t fit inside the previous paradigms. Using his theories, scientists and engineers learned that the structure of space itself could be manipulated. The first major application led to practical, safe, and efficient fusion power. Rather than forcing high-energy particles together, the forces keeping them apart were just removed. Or, more accurately, the manifestation of space between them was inverted. It took very little energy, was easy to control, but only worked in a very localized fashion

Then there’s this excellent non-technical explanation of a new theory of Shape Dynamics. An excerpt or two:

Their latest offering is something called “shape dynamics.” (If you’ve never heard of shape dynamics, that’s OK—neither have most physicists.) It could, of course, be a dead end, as most bold new ideas in physics are. Or it could be the next great revolution in our conception of the cosmos. Its supporters describe it as a new way of looking at gravity, although it could end up being quite a bit more than that. It appears to give a radical new picture of space and time—and of black holes in particular. It could even alter our view of what’s “real” in the universe.

* * *

In most situations, shape dynamics predicts what Einstein’s theory predicts. “For the vast majority of physical situations, the theories are equivalent,” Gryb says. In other words, the two frameworks are almost identical—but not quite.

Imagine dividing space-time up into billions upon billions of little patches. Within each patch, shape dynamics and general relativity tell the same story, Gryb says. But glue them all together, and a new kind of structure can emerge. For a concrete example of how this can happen, think of pulling together the two ends of a long, narrow strip of paper: Do it the usual way, and you get a loop; do it with a twist and you get a Möbius strip. “If you glue all the regions together to form a kind of global picture of space and time, then that global picture might actually be different.” So while shape dynamics may recreate Einstein’s theory on a small scale, the big-picture view of space and time may be novel.

Another prediction come true?

Not really — there were intimations of this theory when I was working on CoD, and it is a *very* long way from being accepted as valid, as the Nova article discusses.

But still …

 

Jim Downey

PS: new review of Communion of Dreams was put up yesterday. Check it out.

 

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Limits of perception.

From the beginning of Chapter 18 of Communion of Dreams:

“But there’s something else going on. Perhaps I was being too hasty in considering this to be just a four-dimensional problem.”

“Sorry? You lost me there,” said Jon.

Gish ignored him, his attention turning in on itself. “Yes. Clearly there’s a proximity effect. Perhaps anyone who touches the artifact becomes somehow connected to the outer surface of the bubble.”

“Wait, you mean that the artifact is some kind of doorway to another dimension?”

Gish looked at Jon, annoyed. “What? Doorway? No, just that the surface of the isolation field may not conform to our simple space-time geometry.”

Not too surprising that Robert Gish was aware of this recent theory, since he’s some 39 years in our future:

A Jewel at the Heart of Quantum Physics

Physicists have discovered a jewel-like geometric object that dramatically simplifies calculations of particle interactions and challenges the notion that space and time are fundamental components of reality.

“This is completely new and very much simpler than anything that has been done before,” said Andrew Hodges, a mathematical physicist at Oxford University who has been following the work.

The revelation that particle interactions, the most basic events in nature, may be consequences of geometry significantly advances a decades-long effort to reformulate quantum field theory, the body of laws describing elementary particles and their interactions. Interactions that were previously calculated with mathematical formulas thousands of terms long can now be described by computing the volume of the corresponding jewel-like “amplituhedron,” which yields an equivalent one-term expression.

It’s an absolutely fascinating article & theory, and deserves consideration: that many of the observational problems with quantum mechanics may be due to our limited perspective from this space-time, just as our perspective from one reference point gave rise to the notion that there is something which could be considered a “universal time” — a notion which a certain Mr. Einstein dealt with.

Which, while all the math is completely beyond me, makes a certain amount of intuitive sense from the history of science. Which is: the slow progression of realization that none of our privileged positions are true. That the Sun doesn’t revolve around the Earth. That humankind isn’t different from all the other animals. That our perception of time isn’t the only one. So why should this set of spacial dimensions be the basis for reality?

Which is why I felt comfortable coming up with the “theoretical discovery” at the heart of Communion of Dreams, as discussed in this passage from Chapter 3:

Apparent Gravity was the third major application of the theories set forth in Hawking’s Conundrum, the great opus of Stephen Hawking which was not published until after his death in the earlier part of the century. He hadn’t released the work because evidently even he couldn’t really believe that it made any sense. It was, essentially, both too simple and too complex. And since he had died just shortly before the Fire-flu, with the chaos that brought, there had been a lag in his theory being fully understood and starting to be applied.

But it did account for all the established data, including much of the stuff that seemed valid but didn’t fit inside the previous paradigms. Using his theories, scientists and engineers learned that the structure of space itself could be manipulated. The first major application led to practical, safe, and efficient fusion power. Rather than forcing high-energy particles together, the forces keeping them apart were just removed. Or, more accurately, the manifestation of space between them was inverted. It took very little energy, was easy to control, but only worked in a very localized fashion.

And just for fun, here’s a little hint from my work on St. Cybi’s Well: there’s a character in there who has something of the perspective of the people working on the “amplituhedron theory” and applies it in his own way to explain the dark matter/dark energy problem. Well, it amuses me, anyway.

And I should get back to work on that.

 

Jim Downey

Via MeFi and elsewhere. The MeFi link has a lot of other links in both the post and the following discussion, if you would like more information and … perspective. 😉

Oh, and this seems entirely appropriate – start at 35 seconds: