All Questions
Tagged with information general-relativity
20 questions
8
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1
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577
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Could information be transferred through a wormhole?
There was a paper published recently about the possibility of sending messages through a wormhole,see reference here. It has also been speculated that any entangled pair of particles—even particles ...
- 1,019
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0
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78
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Why black hole erase information
It is usually said that according to the no hair theorem, black holes erase the information enter them which reduce the entropy and imply the so called "information paradox".
The problem is ...
- 1,774
8
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3
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Why are physicists surprised that the information of a black hole is proportional to its boundary? #2
Inspired by Why are physicists surprised that the information of a black hole is proportional to its boundary?
Intuitively, one of two things must happen to information that enters a black hole: ...
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1
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0
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117
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Information geometry and emerging general relativity in parametric space of univariant Gaussian
I am working on a problem of information geometry. Using Fisher information metric It is possible to show that Einstein tensor and stress energy tensor can be calculated. When I took univariate ...
1
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0
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107
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Can information leak through between merging black holes during the merger?
There are other questions on this site about black hole mergers and information, but none of them answer my question.
What happens to information when black holes merge?
This does not give a ...
- 29.3k
3
votes
1
answer
353
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Finite computational power of universe vs continuous nature of unbounded particles
I am not a physicist, but I've worked to make this an intelligible question for SE.
What information is exactly and how it is stored in the universe is still being studied, but here Seth Lloyd gives ...
- 600
4
votes
2
answers
213
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What is meant by "information" with regard to general relativity and/or black holes?
In The Universe in a Nutshell chapter 4, Hawking explains the warping of spacetime according to general relativity and introduces the basics of black holes.
It surprised me to read about "information"...
2
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3
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187
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Information content in black holes
Bekenstein-Hawking formula for entropy of a black hole tells us that information content in a black hole is proportional to its area which is in fact proportional to the mass^2 of the black hole. The ...
0
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0
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57
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Do gravitational waves violate the information paradox? [duplicate]
I know when black holes collide, the remnant black hole has a lower mass than the sum of the original two masses. This is due to energy loss via gravitational wave emission.
Does this violate the ...
user203234
2
votes
1
answer
351
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Can black hole complementarity be described in general relativistic language?
If my understanding is correct, Black hole complementarity says that from the perspective of those not falling into a black hole, those falling into a black hole is seen as never crossing the event ...
- 389
3
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0
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43
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Is this a way light/information could escape from a black hole? [duplicate]
Since we have now confirmed that two black holes can combine into one, I have wondered about the Lagrange point (balancing of gravity) that has to exist between them. As the two holes approach and ...
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5
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0
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About the relation between entropy and Fisher information matrix
It's well known that the Fisher information metric can be given by $$g_{i,j}=-E\left[\frac{\partial \ln(p(x,\theta))}{\partial \theta_{i}}\frac{\partial \ln(p(x,\theta))}{\partial \theta_{j}}\right],$$...
- 1,576
14
votes
2
answers
996
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Did merging Black Holes in GW150914 give up entropy and information to the gravitational waves, since they lost 3 solar masses?
Since the final Black Hole (BH) had 3 solar masses less of mass than the original binary BH, it seems the 2 BHs lost mass, and with it event surface area, entropy, and information. If that came from ...
- 14.1k
8
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3
answers
2k
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Sending information faster than light
If I could ever send my friend any information faster than light it would violate causality. If he just guesses the information and acts on it before he could ever receive it, everything is fine. What ...
- 303
0
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2
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48
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entropy-infomartion correlation at preliminary universe?
according to the theory of cosmic inflation after Alan Guth, the information should have travelled 100 times the speed of light at the very beginning after the big bang.
-when we talk about ...
9
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1
answer
1k
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No hair theorem and black hole entropy
The no hair theorem says that black holes rapidly converge to a state that is completely described just by their mass, spin and charge. Black hole thermodynamics says that the black hole entropy is ...
- 3,540
8
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1
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If distant observers never see a black hole form in finite time how can the information paradox be a problem?
So, at least as reported in the media, the physics community is still struggling with the problem of resolving the impossibility of retrieving information from beyond the event horizon of a black hole ...
- 385
25
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2
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1k
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Does the Black Hole Information Paradox apply to nonstationary black holes?
When I first heard about the black hole information paradox, I thought it had no content. At the time, papers about it had been written for numerous years and they keep on coming. Now that the press ...
- 13.9k
11
votes
2
answers
947
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Would the horizon of a black hole be different for a tachyon than for subluminal matter or photons?
One of the most useful black hole analogies I've seen imagines that space is "flowing" like a river into a black hole, and the point at which it flows in faster than c is the horizon. This analogy ...
- 1,484
17
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4
answers
1k
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Black hole complementarity - absorption of Hawking radiation
I try to understand two principles formulated by Leonard Susskind in his book The Black Hole War:
1, To any observer who remains outside a black hole, the stretched horizon appears to be a hot layer ...
- 2,193