What if our universe is just a massive White Hole that exploded, thus the Big Bang...
By Ron Cowen
Black holes might end their lives by transforming into their exact opposite — ‘white holes’ that explosively pour all the material they ever swallowed into space, say two physicists. The suggestion, based on a speculative quantum theory of gravity, could solve a long-standing conundrum about whether black holes destroy information.
The theory suggests that the transition from black hole to white hole would take place right after the initial formation of the black hole, but because gravity dilates time, outside observers would see the black hole lasting billions or trillions of years or more, depending on its size. If the authors are correct, tiny black holes that formed during the very early history of the Universe would now be ready to pop off like firecrackers and might be detected as high-energy cosmic rays or other radiation. In fact, they say, their work could imply that some of the dramatic flares commonly considered to be supernova explosions could in fact be the dying throes of tiny black holes that formed shortly after the Big Bang.
Albert Einstein’s general theory of relativity predicts that when a dying star collapses under its own weight, it can reach a stage at which the collapse is irreversible and no known force of nature can stop it. This is the formation of a black hole: a spherical surface, known as the event horizon, appears, shrouding the star inside from outside observers while it continues to collapse, because nothing — not even light or any other sort of information — can escape the event horizon.
Because dense matter curves space, ‘classical’ general relativity predicts that the star inside will continue to shrink into what is known as a singularity, a region where matter is infinitely dense and space is infinitely curved. In such situations, the known laws of physics cease to be useful.
Many physicists, however, believe that at some stage in this process, quantum-gravity effects should take over, arresting the collapse and avoiding the infinities.
In a loop
One of the leading approaches to merging quantum theory and gravity, pioneered by, among others, theoretical physicist Carlo Rovelli of Aix-Marseille University in France, posits that it is not just gravity but space-time itself that is quantized, woven from tiny, individual loops that cannot be subdivided any further. The loops in this ‘loop quantum gravity’ — a theoretical attempt that has yet to find experimental support — would be so tiny that to any observer space-time looks smooth and continuous. In the new work1, Rovelli and his Aix-Marseille colleague Hal Haggard have calculated that the loop structure would halt the collapse of a black hole.
The collapsing star would reach a stage at which its inside can shrink no further, because the loops cannot be compressed into anything smaller, and in fact they would exert an outward pressure that theorists call a quantum bounce, transforming a black hole into a white hole. Rather than being shrouded by a true, eternal event horizon, the event would be concealed by a temporary ‘apparent horizon’, says Rovelli. (Theoretical physicist Stephen Hawking of the University of Cambridge, UK, has recently suggested that true event horizons would be incompatible with quantum physics.)
Other loop-quantum theorists have made similar calculations for cases in which it is not just a star that is collapsing but an entire universe2, 3. They found that the universe could bounce back, and suggested that our own Universe’s Big Bang could in fact have been such a ‘big bounce’. Rovelli and Haggard have now shown that the quantum bounce does not require an entire universe to collapse at once. “We think this is a possible picture,” says Rovelli. “We have found that the [transformation] process can be completely contained in a limited region of space-time. Everything outside behaves following the classical Einstein equations.”
Results 1 to 3 of 3
- Join Date
- Oct 2006
- Fort Worth, TX
- PSN ID
- Rep Power
- 150,941 (0 Banked)
Quantum Bounce Could Make Black Holes Explode
-=[ PSN ID: Tha_MonkeyClaw ]=-
- Join Date
- Aug 2005
- Rep Power
- 82,168 (0 Banked)
I'd like to see some actual math backing this up. Otherwise it's the equivalent of stuffing the cube into the triangle-shaped hole and claiming it'll work eventually.
First off, we know information can be destroyed. In fact it's continually happening everywhere. All of matter and energy is restrained by the light barrier. C is moving just as fast from an object traveling relatively one KM/h as it is to an object traveling at 10,000 KM/h. No matter the reference point light continues moving at C from it's perspective. When light propagates through spacetime it passes also along it's curvature, being warped by gravity. As we know, time dilation affects the perceived rate of time within a reference frame differently than outside of it. When two reference points traveling at different speeds interact, they lose information to equalize their reference frame in comparison to c.
Here's what I mean. If you're standing by a train and not moving, and the train accelerates by at 90% the speed of light (let's ignore the repercussions of this...), the person on the train is still perceiving light the same way you are. In their reference point they are standing still, and you are the one moving past at 90% c. Light is functioning the same for both reference points, but it's moving between both reference points too. How? It's only possible because the reference point for light is distorted -- information is lost.
That's okay though, because the information available in the universe wasn't all that was created in the Big Bang. Whence cometh new information, you ask? Scientists don't know for certain, but they believe it arrives as a result of dark matter at the quantum level. It's some spooky science that we don't really understand yet, but it's serving to renew the information we slowly lose. In fact, studies show the universe may be increasing it's reservoir of information (not to be confused with opposing entropy).
- Join Date
- Aug 2008
- PSN ID
- Rep Power
- 157,933 (0 Banked)
I think my brain just melted
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)