Viewpoint: Black Hole Evolution Traced Out with Loop Quantum Gravity
[Pennsylvania State University researchers] have shown that loop quantum gravity—a candidate theory for providing a quantum-mechanical description of gravity—predicts that spacetime continues across the center of the hole into a new region that exists in the future and has the geometry of the interior of a white hole. A white hole is the time-reversed image of a black hole: in it, matter can only move outwards. The passage "across the center" into a future region is counterintuitive; it is possible thanks to the strong distortion of the spacetime geometry inside the hole that is allowed by general relativity. This result supports a hypothesis under investigation by numerous research groups: the future of all black holes may be to convert into a real white hole, from which the matter that has fallen inside can bounce out. However, existing theories have not been able to fully show a way for this bounce to happen. That loop quantum gravity manages to do it is an indication that this theory has ripened enough to tackle real-world situations.
[...] During the last few years, a number of research groups have applied loop theory to explore the evolution of black holes. These efforts are building a compelling picture based on a black-to-white-hole transition scenario, which can be summarized as follows. At the center of the black hole, space and time do not end in a singularity, but continue across a short transition region where the Einstein equations are violated by quantum effects. From this region, space and time emerge with the structure of a white hole interior, a possibility suggested in the 1930s by physicist John Lighton Synge. As the hole's center evolves, its external surface, or "horizon," slowly shrinks because of the emission of radiation—a phenomenon first described by Stephen Hawking. This shrinkage continues until the horizon reaches the Planck size (the characteristic scale of quantum gravity) or earlier, at which point a quantum transition ("quantum tunneling") happens at the horizon, turning it into the horizon of a white hole. Thanks to the peculiar distorted relativistic geometry, the white hole interior born at the center joins the white horizon, completing the formation of the white hole.
If true, it would still be difficult to exploit this transition for time travel since you would likely be destroyed by tidal forces.
Quantum Transfiguration of Kruskal Black Holes (DOI: 10.1103/PhysRevLett.121.241301) (DX)
Quantum extension of the Kruskal spacetime (DOI: 10.1103/PhysRevD.98.126003) (DX)
(Score: 2, Interesting) by Anonymous Coward on Tuesday December 25 2018, @05:07PM (5 children)
This makes a testable prediction.
The transition time has a lower bound of 13 to 14 billion years.
This means that primordial black holes should be converting right about now.
We should be seeing these things.
When they transition it would emit an otherwise unexplainable Ultra High Energy Gamma Ray burst.
(Score: 2) by takyon on Tuesday December 25 2018, @06:01PM (1 child)
It's very convenient if true. Kind of like how the Moon is placed just right for solar eclipses.
Oh no,
God is realwe're living in a simulation![SIG] 10/28/2017: Soylent Upgrade v14 [soylentnews.org]
(Score: -1, Spam) by Anonymous Coward on Tuesday December 25 2018, @07:36PM
For this reason, God sends them a powerful delusion(operation of wandering)(planet) so that they will believe the lie.
Mystery Red of the Great American Eclipse [cloudflare-ipfs.com]
It has blood on it! [cloudflare-ipfs.com]
NASA Allais Effect Eclipse Experiment [archive.org]
(Score: 3, Touché) by c0lo on Tuesday December 25 2018, @08:38PM (2 children)
If you stay around some other 10 billion year for the light to reach us...
https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
(Score: 0) by Anonymous Coward on Tuesday December 25 2018, @11:01PM (1 child)
You're assuming these are billions of light years away. There's no reason for them to be very far at all. We could be seeing these and not know it. There have already been numerous GRB events that we cannot explain. Well here's a convenient explanation.
(Score: 2) by c0lo on Wednesday December 26 2018, @11:44PM
GRB [wikipedia.org]
https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford