All Questions
15
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Black hole information paradox
I read that it is generally believed that information is preserved in black hole evaporation, and people's views only diverge when it comes to how information is preserved. Is this true?
- 117
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0
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74
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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 ...
- 1,734
8
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3
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2k
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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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45
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Would the Earth become a black hole due to excess of information?
I was reading 'Welcome to The Universe', where in the appendix is a situation in which a hard disk, 7.5 cm in diameter, stores more and more information, before eventually becoming a black hole.
...
- 2,162
11
votes
2
answers
836
views
Thermal radiation contains no information?
I have often read that
thermal radiation contains no information.
Could someone elucidate this claim?
The statement looks puzzling to me because in apparent contradiction with the two following ...
- 5,220
2
votes
3
answers
180
views
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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77
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Bekenstein Bound / Holographic Principle at Extremely Low Temperatures
I'm curious about a possible connection between the Berkenstein Bound and the physical nature of information, specifically in reference to the fact that the amount of information that can be written ...
- 187
1
vote
1
answer
86
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Is the total information in the (visible) universe compatible with the one on the surface of a black hole with the same radius?
Is the total information available in the universe compatible with the entropy we would find on the surface of an hypothetical black hole whose radius is the visible universe one ($\sim14$ Gpc)?
We ...
- 406
48
votes
3
answers
5k
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Why is the information paradox restricted to black holes?
I am reading Hawking's "Brief answers". He complained that black holes destroy information (and was trying to find a way to avoid this). What I don't understand: Isn't deleting information quite a ...
4
votes
1
answer
189
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What is the most likely/favoured theory put forth explaining the Black hole information paradox?
What is the most likely/favoured theory put forth explaining the Black hole information paradox? Is there any theory that is most favoured that has no flaws, or most likely explains how black holes ...
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6
votes
1
answer
2k
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Page time and black hole scrambling of information
Page time is, as far as I know, the time a black hole uses, to reduce its entropy to the half.
Why is the Page time important, with respect to the total evaporation time given by the Hawking pioneer ...
- 6,611
1
vote
2
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669
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How can Maxwell's Demon erase information while a black hole can not?
It is stated, that information can't disappear even in black holes.
On the other hand, it is stated, that mystic beings, like Maxwell demons, can easily erase any information if they just pay with ...
- 1,732
4
votes
2
answers
2k
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Where does information go if thermodynamic death?
Often read that until Hawking the black holes were introducing a problem with information. Allegedly information should be unable disappear, while this was happening in classic black holes.
What ...
- 1,732
4
votes
1
answer
453
views
Wasn't the Hawking Paradox solved by Einstein?
I just watched a BBC Horizon episode where they talked about the Hawking Paradox. They mentioned a controversy about information being lost but I couldn't get my head around this.
Black hole ...
- 43
8
votes
2
answers
784
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What happens to information when black holes merge?
When a small black hole mergers with the larger black hole, Would an observer trapped in the smaller black hole be able to detect any difference? Does the observer still exists in the smaller black ...
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