"Our Universe Exists in a Region of an Enormous Universe"--Two World-Leading Physicists
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June 02, 2011

"Our Universe Exists in a Region of an Enormous Universe"--Two World-Leading Physicists

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Is our universe merely a part of an enormous universe containing diverse regions each with the right amount of the "dark energy" and each larger than the observed universe. Raphael Bousso, Professor of Theoretical Physics, U of California/Berkeley and Leonard Susskind, Felix Bloch Professor of Physics, Stanford University, suggest that information can leak from our causal patch into others, allowing our part of the universe to "decohere" into one state or another, resulting in the universe that we observe.

The many worlds interpretation of quantum mechanics is the idea that all possible alternate histories of the universe actually exist. At every point in time, the universe splits into a multitude of existences in which every possible outcome of each quantum process actually happens.The reason many physicists love the many worlds idea is that it explains away all the strange paradoxes of quantum mechanics.

Let's put the many world interpretation aside for a moment and look at another strange idea in modern physics. This is the idea that our universe was born along with a large, possibly infinite, number of other universes. So our cosmos is just one tiny corner of a much larger multiverse.

Susskind and Bousso have put forward the idea that the multiverse and the many worlds interpretation of quantum mechanics are formally equivalent, but if both quantum mechanics and the multiverse take special forms.

Let's take quantum mechanics first. Susskind and Bousso propose that it is possible to verify the predictions of quantum mechanics. In theory, it could be done if an observer could perform an infinite number of experiments and observe the outcome of them all, which is known as the supersymmetric multiverse with vanishing cosmological constant.

If the universe takes this form, then it is possible to carry out an infinite number of experiments within the causal horizon of each other. At each instant in time, an infinite (or very large) number of experiments take place within the causal horizon of each other. As observers, we are capable of seeing the outcome of any of these experiments but we actually follow only one.

Bousso and Susskind argue that since the many worlds interpretation is possible only in their supersymmetric multiverse, they must be equivalent. "We argue that the global multiverse is a representation of the many-worlds in a single geometry," they say, calling this new idea the multiverse interpretation of quantum mechanics.

But we have now entered the realm of what mathematical physicist Peter Woit of Columbia calls "Not Even Wrong, because the theory lacks is a testable prediction that would help physicists distinguish it experimentally from other theories of the universe. And without this crucial element, the multiverse interpretation of quantum mechanics is little more than philosophy, according to Woit.

What this new supersymmetric multiverse interpretation does have is a simplicity-- it's neat and elegant that the many worlds and the multiverse are equivalent. Ockham's Razor is fulfilled and no doubt, many quantum physicists delight in what appears to be an exciting. plausible interpretation of ultimate if currently untestable, reality.

Ref: arxiv.org/abs/1105.3796: The Multiverse Interpretation of Quantum Mechanics

http://mobile.technologyreview.com/blog/arxiv/26787/



http://spoonless.livejournal.com/186158.html








Comments

Oh now that's my kind of awesome.

I've never like the "parallel universe" idea, at least not in the "Sliders" sense in that there are infinite amounts of them due to one existing for every "decision" made, even at the quantum level. I can handle a relative linear infinity, such as the verse appearing as infinitely small as it is large, but I can't handle an exponential infinity. It makes for a fun story, but I just can't see the omniverse operating that way. Then again, I also don't think black holes & their singularities are transdimensional or subspace transportational mechanisms, just incredibly massive energy "blenders", like the ones you make margaritas with if you don't mind me using absurd comparisons like so many science shows do. "Wormholes" on the other hand...

Well, this is exactly not, what these physicists are claiming in their article - but if you know about me and AWT theory, you could recognize, I'm rather convenient with such view.

In AWT (dense aether theory) the observable Universe appears like the visible part of fractal landscape under the fog - such area of visibility travels together with its observer and it has no fixed place in hyper universe.

At least we can observe, how the understanding of mainstream physics converges into AWT..


The other verses are much more fashionable than this backwater slum; you can even get a decent taco three branes over. Talk about your intelligent life elsewhere...

We can only explain why we are here if Everything else Also has a chance to happen and will, somewhere.

"the idea that the multiverse and the many worlds interpretation of quantum mechanics are formally equivalent, but if both quantum mechanics and the multiverse take special forms."
IF? 'If' implies a 'then'. This sentence doesn't have one, so what does it mean? Should it read 'only if' ?

if you are a pair of shoes in a shoe box in a shoe store in a shopping mall in a neighborhood in a city in a state in a country in a world in a solar system in a galaxy in a galactic cluster in a super galactic cluster...does it matter if no one buys you?

if you are a pair of shoes in a shoe box in a shoe store in a shopping mall in a neighborhood in a city in a state in a country in a world in a solar system in a galaxy in a galactic cluster in a super galactic cluster...does it matter if no one buys you?

Lol! That's funny stuff Mark!

so i guess in another universe OJ really didn't do it.... lol this is beyond ever being real

Can >perfection< mean less than all possibilities? from the bizarrest and darkest dimensions to the perfect harmony and celestial beauty? somewhere between are travelling our souls. why? find it out!

How do we know what's real in the other parallel universes? Their laws are not our laws, there may be no laws of physics, nature etc. We are learning only the beginning and may never have all the answers which may be as it was meant to be in only this universe...


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