Author Topic: A Mathematical Proof Universe Could Have Formed Spontaneously  (Read 1005 times)

Offline stromboli (OP)

https://medium.com/the-physics-arxiv-blog/ed7ed0f304a3

Quote
"......But that still leaves a huge puzzle. What caused the Big Bang itself? For many years, cosmologists have relied on the idea that the universe formed spontaneously, that the Big Bang was the result of quantum fluctuations in which the Universe came into existence from nothing......

....Today they get their wish thanks to the work of Dongshan He and buddies at the Wuhan Institute of Physics and Mathematics in China. These guys have come up with the first rigorous proof that the Big Bang could indeed have occurred spontaneously because of quantum fluctuations.

The new proof is based on a special set of solutions to a mathematical entity known as the Wheeler-DeWitt equation. In the first half of the 20th century, cosmologists struggled to combine the two pillars of modern physics— quantum mechanics and general relativity—in a way that reasonably described the universe. As far as they could tell, these theories were entirely at odds with each other......
The question is: does the Wheeler-DeWitt equation allow this? “We prove that once a small true vacuum bubble is created, it has the chance to expand exponentially,” say Dongshan and co.

Their approach is to consider a spherical bubble that is entirely described by its radius. They then derive the equation that describes the rate at which this radius can expand. They then consider three scenarios for the geometry of the bubble — whether closed, open or flat.

In each of these cases, they find a solution in which the bubble can expand exponentially and thereby reach a size in which a universe can form—a Big Bang.

That’s a result that cosmologists should be able to build on. It also has an interesting corollary.

One important factor in today’s models of the universe is called the cosmological constant. This is a term that describes the energy density of the vacuum of space. It was originally introduced by Einstein in his 1917 general theory of relativity and later abandoned by him after Hubble’s discovery that the universe was expanding.

Until the 1990s, most cosmologists assumed that the cosmological constant was zero. But more recently, cosmologists have found evidence that something is causing the expansion of the universe to accelerate, implying that the cosmological constant cannot be zero. So any new theory of the universe must allow for a non-zero value of the cosmological constant.

What plays the role of the cosmological constant in Dongshan and co’s new theory? Interestingly, these guys say a quantity known as the quantum potential plays the role of cosmological constant in the new solutions.

This potential comes from an idea called pilot-wave theory developed in the mid-20th century by the physicist David Bohm. This theory reproduces all of the conventional predictions of quantum mechanics but at the price of accepting an additional term known as the quantum potential.

The theory has the effect of making quantum mechanics entirely deterministic since the quantum potential can be used to work out things like the actual position of the particle.....

However, mainstream physicists have never taken to Bohm’s idea because its predictions are identical to the conventional version of the theory so there is no experimental way of telling them apart. However, it forces physicists to accept a probabilistic explanation for the nature of reality, something they are generally happy to accept.

The fact that the quantum potential is a necessary part of this new mathematical derivation of the origin of the universe is fascinating. Perhaps it’s time to give Bohm’s ideas another spin round the block."

Ref: arxiv.org/abs/1404.1207 : Spontaneous Creation Of The Universe From Nothing


Re: A Mathematical Proof Universe Could Have Formed Spontaneously
« Reply #1 on: May 17, 2014, 12:51:00 PM »
If you and Palazzo keep it up my head is going to create a big bang. Stop it! Stop it now!   :naughty: :trunksthing:  :biggrin: Solitary
There is nothing more frightful than ignorance in action.

Offline josephpalazzo

Re: A Mathematical Proof Universe Could Have Formed Spontaneously
« Reply #2 on: May 17, 2014, 01:09:17 PM »
If you and Palazzo keep it up my head is going to create a big bang. Stop it! Stop it now!   :naughty: :trunksthing:  :biggrin: Solitary

No one is saying this is it. But it is a distinct possibility, supported by the prevailing theories. So you cannot dismiss out right just because it may make your head "splose".

 :madu:

Re: A Mathematical Proof Universe Could Have Formed Spontaneously
« Reply #3 on: May 17, 2014, 09:42:49 PM »
The new proof is based on a special set of solutions to a mathematical entity known as the Wheeler-DeWitt equation.
Constants and variables, Mister DeWitt.

Offline Hakurei Reimu

Re: A Mathematical Proof Universe Could Have Formed Spontaneously
« Reply #4 on: May 17, 2014, 11:34:43 PM »
If you and Palazzo keep it up my head is going to create a big bang. Stop it! Stop it now!
Don't worry. We'll have the mop ready.  :wink2:
Warning: Don't Tease The Miko!
(she bites!)
Spinny Miko Avatar shamelessly ripped off from Iosys' Neko Miko Reimu

Re: A Mathematical Proof Universe Could Have Formed Spontaneously
« Reply #5 on: May 18, 2014, 11:50:16 AM »
Where's Casparov when I need him?  :doh: :rotflmao: Solitary
There is nothing more frightful than ignorance in action.

Offline josephpalazzo

Re: A Mathematical Proof Universe Could Have Formed Spontaneously
« Reply #6 on: May 18, 2014, 01:10:21 PM »
To Casparov, you're just an illusion.

Offline stromboli (OP)

Re: A Mathematical Proof Universe Could Have Formed Spontaneously
« Reply #7 on: May 19, 2014, 11:10:09 AM »
I have shit for math skills, but I love the idea of Einstein's quest of a theory of everything. The thought that one day we can define reality to the point of being able to explain it mathematically is a very elegant idea, to say the least. May not happen, but following the quest for knowledge is fascinating.