Parallel Universes may exist according to scientists

[Lek]

We May Have Uncovered the First Ever Evidence of the Multiverse
Erik Dreyer/Getty
IN BRIEF

A recent study on a space anomaly that has perplexed scientists for years has some suggesting that it could be explained by a parallel "bubble universe" — although there are other, more standard potential explanations, as well.
TOO COLD

For years, scientists have been baffled by a weird anomaly far away in space: a mysterious “Cold Spot” about 1.8 billion light-years across. It is cooler than its surroundings by around 0.00015 degrees Celsius (0.00027 degrees Fahrenheit), a fact astronomers discovered by measuring background radiation throughout the universe.

9 Physics Questions Baffling Scientists [INFOGRAPHIC]
Click to View Full Infographic
Previously, astronomers believed that this space could be cooler simply because it had less matter in it than most sections of space. They dubbed it a massive supervoid and estimated that it had 10,000 galaxies fewer than other comparable sections of space.

But now, in a recently published survey of galaxies, astronomers from the Royal Astronomical Society (RAS) say they have discovered that this supervoide could not exist. They now believe that the galaxies in the cold spot are just clustered around smaller voids that populate the cold spot like bubbles. These small voids, however, cannot explain the temperature difference observed.


MULTIVERSE?

To link the temperature differences to the smaller voids, the researchers say a non-standard cosmological model would be required. “But our data place powerful constraints on any attempt to do that,” explained researcher Ruari Mackenzie in an RAS press release. While the study had a large margin of error, the simulations suggest there is only a two percent probability that the Cold Spot formed randomly.

Credit: The Royal Astronomical Society
Credit: The Royal Astronomical Society
“This means we can’t entirely rule out that the Spot is caused by an unlikely fluctuation explained by the standard model. But if that isn’t the answer, then there are more exotic explanations,” said researcher Tom Shanks in the press release. “Perhaps the most exciting of these is that the Cold Spot was caused by a collision between our universe and another bubble universe.”

If more detailed studies support the findings of this research, the Cold Spot might turn out to be the first evidence for the multiverse, though far more evidence would be needed to confirm our universe is indeed one of many.


https://futurism.com/new-evidence-ab...-a-multiverse/

[Lek]

Ripples in Space-Time Might Indicate That We Live in a Multiverse
NASA
IN BRIEF

Signs of extra dimensions may reveal themselves in the way they impact gravitational waves. Scientists hope that further study of these waves might allow for a single, coherent theory of the universe.
HUNTING FOR EXTRA DIMENSIONS

As important as gravity is to us here on Earth, it is actually surprisingly weak in comparison to other fundamental forces in our universe, such as electromagnetism. In fact, as researchers struggle to unite quantum effects and gravity in single theories that make sense, they find that extra dimensions, usually with gravity, are implied.

However, theorizing the existence of these extra dimensions is much easier than actually proving that they exist. Scientists were hopeful that the Large Hadron Collider (LHC) might reveal evidence of their existence. After all, the device gives them the ability to run specialized experiments searching for massive particle traces, microscopic black holes, and missing energy caused by the migration of gravitons to higher dimensions. So far, however, definitive proof has not been discovered with the LHC.

In their search for answers, researchers Gustavo Lucena Gómez and David Andriot at the Max Planck Institute for Gravitational Physics in Potsdam, Germany, have honed in on two strange effects: high frequency gravitational waves and the “breathing mode,” a modification of how gravitational waves stretch space.




The researchers calculated that extra dimensions should result in the creation of extra, high frequency gravitational waves. Unfortunately, we don’t currently have observatories that can detect frequencies in the range they predict, nor are any in development.

However, we do have the tech needed to observe the breathing mode. Space changes shape as it reacts to gravity passing through it. The breathing mode is seen when, in addition to stretching and squishing, space expands and contracts in reaction to additional gravitational waves. “With more detectors we will be able to see whether this breathing mode is happening,” Lucena Gómez told New Scientist.

Based on the researchers’ calculations, the additional waves at high frequencies would point decisively to extra dimensions. However, the breathing mode could have explanations beyond those theoretical dimensions, but its detection would be a significant clue pointing toward their existence.

EXPLAINING OUR UNIVERSE

Even without definitive proof, we’re making progress in our hunt for other dimensions. Since 2015, scientists have been able to observe gravitational waves, and because gravity probably exists in other dimensions, observing and analyzing the behavior of these waves under different conditions might provide clues about those extra dimensions. The existence of another dimension makes weak gravitational force more understandable — if gravity exists throughout all of these extra dimensions as well, it should be weaker.

The Evolution of Human Understanding of the Universe [INFOGRAPHIC]
Click to View Full Infographic
Put another way, the existence of extra dimensions would allow for a coherent, comprehensive theory of the universe. It would also explain uncertainties about the nature of gravity. It would even put us on the road to explaining why the universe is expanding faster and faster. “If extra dimensions are in our universe, this would stretch or shrink space-time in a different way that standard gravitational waves would never do,” explained Lucena Gómez.

Proof of an extra dimension would be extraordinarily exciting for physicists working to explain the laws of the universe with a single, coherent theory. If we were able to reconcile the conflicts between quantum field theory and general principles of relativity, for example, things like antigravity, instantaneous communication and transport, transmutation of matter, and faster-than-light travel might all be possible. For now, we don’t have a definitive answer, but understanding the behaviors of gravitational waves would be a remarkable step in the right direction.

https://futurism.com/ripples-in-spac...-a-multiverse/

[Lek]

Worlds Without End: The Many Kinds of Parallel Universes
IN BRIEF

Parallel universes are a staple of science fiction, but the notion originates in some very important cosmological theories that may help us understand our universe.
And if parallel universes really do exist, could we ever travel to one?
MULTIVERSAL

It’s a frequent staple of science fiction—the notion that there’s another universe out there, coextensive with yet sejunct from our own; a distinct, alternate reality populated by our doppelgängers, who made all the right choices and are happily living the life we always dreamed for ourselves.

Or perhaps there’s a “multiverse”—a multitude of divergent spacetime continua, offspring of that same primordial Big Bang that gave rise to our own, each exhibiting some uniquely different physical, mathematical, or chemical property that might preclude the evolution of life as we know it.

These are familiar concepts—but what is a parallel universe, really? There are nearly as many definitions as there are potential universes in a multiverse, but let’s take a look at just a few of the myriad possibilities of cosmological plurality.




MANY WORLDS

Imagine an infinite universe. That’s not exactly in keeping with the best theoretical models propounded by cosmologists, which indicate we exist within an expanding but definitely finite universe that arose some 14 billion years ago.

But if the universe were infinite, then it’s mathematically conceivable that somewhere out there amidst all that immeasurable vastness is a lonely pocket of spacetime where matter and energy have assumed identical, or nearly identical, configurations to our own little corner of cosmic creation.

This form of “parallel universe” would be safely cushioned from us by the universal speed limit set by the velocity of light; but if you really wanted to get there, it’s been calculated that an identical cosmological volume would only be 1010^115 meters away, and your identical copy just 1010^29 meters away.

And that’s hardly the strangest form of parallel universe. Some cosmologists envision the early inflationary epoch spawning a multitude of “bubble universes”—in other words, the universe expanded at such a breakneck speed that pocket spacetimes pinched off and became contiguous but separate universes.

“Every experiment that brings better credence to inflationary theory brings us much closer to hints that the multiverse is real,” says Andrei Linde, a theoretical physicist at Standford University.

And there are, of course, many other scenarios that admit of cosmological parallelism. If certain superstring cosmologies are correct, our universe is a 3-dimensional “brane,” one of many, floating like drifting plankton within a hyperdimensional “bulk.” Or, according to the many-worlds interpretation of quantum mechanics, in which alternate universes are continually generated by every particle in the universe exploring every possible timeline, we’re living in a sea of infinite potential subject to our every whim.

The cyclic, oscillating ekpyrotic model of the universe.
The cyclic, oscillating ekpyrotic model of the universe.
VOYAGE TO ANOTHER UNIVERSE

So even if there are multiple universes floating around out there somewhere, what are the odds of us ever being able to reach and explore one? Probably less than zero. We’ve already discussed above the physical impossibility of traveling fast enough to reach the disparate pockets of statistical repetition in an infinite universe; the odds hardly improve when it comes to universes even further removed from us.

And if the brane-theories are remotely correct, it would require liberating oneself completely from the tridimensional constraints of our local brane and “casting off” into the hyperdimensional spaces beyond, hoping somehow to locate and enter another brane. Or, if the “ekpyrotic” scenario is correct, you could conceivably wait until two branes collide, and make the transition at that catastrophic and highly uncertain point in time. This all assuming one is in possession of near-godlike powers of control over matter and energy, and is invulnerable to cosmos-creating energies.

Bottom line: parallel universes or no, we’ve got plenty to keep us occupied within the humble ambit of our own restricted and provincial little spacetime configuration, so perhaps it’s time we adjust our expansive imaginations to just accept the Lilliputian dimensions of our local spacetime

https://futurism.com/worlds-without-...lel-universes/

[Kriptc06]

I think I'm already living in my parallel universe, so many things happened to me you wouldnt believe, I consider myself extremely lucky