Removing complexity layers from the universe's creation

Jul 26, 2013

Complicated statistical behaviour observed in complex systems such as early universe can often be understood if it is broken down into simpler ones. Two physicists, Petr Jizba (currently affiliated with the Czech Technical University in Prague), and Fabio Scardigli (now working at Kyoto University in Japan), have just published results in EPJ C pertaining to theoretical predictions of such cosmological systems' dynamics.

Their work focuses on complex dynamical systems whose statistical behaviour can be explained in terms of a superposition of simpler underlying dynamics. They found that the combination of two cornerstones of contemporary physics—namely Einstein's special relativity and quantum-mechanical dynamics—is mathematically identical to a complex described by two interlocked processes operating at different energy scales. The combined dynamic obeys Einstein's special relativity even though neither of the two underlying dynamics does. This implies that Einstein's might well be an emergent concept and suggests that it would be worthwhile to further develop Einstein's insights to take into account the quantum structure of space and time.

To model the double process in question, the authors consider quantum mechanical dynamics in a background space consisting of a number of small crystal-like domains varying in size and composition, known as polycrystalline space. There, particles exhibit an analogous motion to pollen grains in water, referred to as Brownian motion. The observed relativistic dynamics then comes solely from a particular grain distribution in the polycrystalline space. In the cosmological context such distribution might form during the 's formation.

Finally, the authors' new interpretation focuses on the interaction of a with gravity, that, according to Einstein's , can be understood as propagation in curved space-time. The non-existence of the relativistic dynamics on the basic level of the description leads to a natural mechanism for the formation of asymmetry between particles and anti-particles. When coupled with an inflationary cosmology, the authors' approach predicts that a charge asymmetry should have been produced at ultra-minute fractions of seconds after the Big Bang. This prediction is in agreement with constraints born out of recent cosmological observations.

Explore further: Superstring theorist at University of Florida wins 2015 Heineman Prize

More information: European Physical Journal C 73: 2491, DOI 10.1140/epjc/s10052-013-2491-x

Related Stories

GR20/Amaldi10: Space-time is not the same for everyone

Jul 09, 2013

Before the Big Bang, space-time as we know it did not exist. So how was it born? The process of creating normal space-time from an earlier state dominated by quantum gravity has been studied for years by ...

Researchers explore quantum entanglement

Feb 08, 2013

Albert Einstein called quantum entanglement—two particles in different locations, even on other sides of the universe, influencing each other—"spooky action at a distance."

Revealing quantum flow

Dec 28, 2012

(—UK-based physicist Ole Steuernagel from the University of Hertfordshire, alongside Dimitris Kakofengitis and Georg Ritter, have found that a new powerful tool they call 'Wigner flow' is the quantum ...

Is dark energy static or dynamic?

Nov 12, 2012

(—While hypothesized dark energy can explain observations of the universe expanding at an accelerating rate, the specific properties of dark energy are still an enigma. Scientists think that dark energy could take ...

Recommended for you

Cooling with molecules

16 hours ago

An international team of scientists have become the first ever researchers to successfully reach temperatures below minus 272.15 degrees Celsius – only just above absolute zero – using magnetic molecules. ...

User comments : 3

Adjust slider to filter visible comments by rank

Display comments: newest first

1 / 5 (2) Jul 26, 2013
"...and suggests that it would be worthwhile to further develop Einstein's insights to take into account the quantum structure of space and time."

Oh my gosh! Why didn't I think of that!

It's kind of comical when someone writes with such a supercilious air, who seems to have no idea of what he's writing about - "Their work focuses on complex dynamical systems whose statistical behaviour can be explained in terms of a superposition of simpler underlying dynamics." So are these these two dynamical systems entangled?

5 / 5 (2) Jul 27, 2013
It's a thought experiment. Cool jets, hematite, there's nothing wrong with thought experiments.

What they're saying is that relativity at macro scales *might be* an emergent property of two or more small-scale systems of natural rules, and so discrepancies between relativity and quantum mechanics *might* vanish if we knew what the other small-scale system(s) are, what natural laws they obey. They tested the idea with modeling two simple small-scale systems, with interesting results.

They didn't claim to have proved that those two small-scale systems are real.

It's an interesting way to think about the problem of incompatibility between relativity and quantum mechanics, that's all.

Your question, "So are these two dynamical systems entangled?" seems to be meaningless. The two modeled subsystems interacted to produce relativity as an emergent phenomenon. Entanglement is a quantum mechanical property.
1 / 5 (2) Jul 27, 2013
The links goes back to LQG, so is uninteresting. (LQG has no dynamics, so can't be a basis for physics.)