Simple: the laws of most physics say you can look at something now and work it backwards. Once it falls into a black hole the previous state of what falls into it isn't able to be derived from working backwards because it just fell into a black hole. This isn't rocket science! (Maybe eventually though)
How do black holes destroy information and why is that a problem?
31–40 of 93 posts
Re: How do black holes destroy information and why is that a problem?
#32To save you the read, the summation is in the second-to-last paragraph: > As you have probably noticed, I didn’t say anything about information. That’s because really the reference to information in “black hole information loss” is entirely unnecessary and just causes confusion. The problem of black hole “information loss” really has nothing to do with just exactly what you mean by information. It’s just a term that…
I think the article is already quite concise. Moreover it is nicely written and explains a current open problem in physics from first principles. A summary like this is useful if the underlying article is bloated and clickbait-y but in this case potentially detracts a reader from a good article. As featured on the front page a few days ago [1]: knowledge without understanding is meaningless. [1] https://www.theguardi…
For what it's worth, I think the summary is useful.
Re: How do black holes destroy information and why is that a problem?
#33She also has a music video about Schrödinger's cat: https://youtu.be/I_0laAhvHKE
Re: How do black holes destroy information and why is that a problem?
#34Isn't this resolved by the holographic principle? ( https://en.wikipedia.org/wiki/Holographic_principle )
Yes, but it introduces other problems. And most importantly, it hasn't been successfully tested yet.
Are there even proposed experiments to test this?
My layman understanding of the Holographic Principle is an object falling into a blackhole has it's 3D information copied onto a 2D surface/perimeter (event horizon) and that 2D information can tell us everything about the energy that continues to exist within the 3D volume of the blackhole.
Fractal Mathematics suggests it is possible right? In other words we can infinity extend the perimeter of a shape while maintaining the same volume, but what are the proposed experiments, if any, to observe this phenomena in nature for quanta?
Re: How do black holes destroy information and why is that a problem?
#35mv universe.info /dev/null
i see no issues there
Re: How do black holes destroy information and why is that a problem?
#36man, watch the PBS YouTube channel SpaceTime. They're short, informative, and very well done. they dedicate a handful of episodes to getting you ready for Hawking radiation. https://youtu.be/qPKj0YnKANw
Seconding that recommendation. The clear explanations allowed me to grasp several concepts that I've been trying to understand for decades, for example the "one-electron universe"
Re: How do black holes destroy information and why is that a problem?
#37Simple: the laws of most physics say you can look at something now and work it backwards. Once it falls into a black hole the previous state of what falls into it isn't able to be derived from working backwards because it just fell into a black hole. This isn't rocket science! (Maybe eventually though)
I do not think the issues raised here are so simple that you can answer the question without mentioning entropy, which, at first sight, might appear to show that information loss is routine.
Re: How do black holes destroy information and why is that a problem?
#38This is literally what the holographic principle addresses... https://youtu.be/B2ksDczJOAs Leonard Susskind has enough accessible vids and lectures to give a conceptual idea of how it works out.
Re: How do black holes destroy information and why is that a problem?
#39She must be a teacher at Professor Xavier's School for Gifted Youngsters.
Re: How do black holes destroy information and why is that a problem?
#40> The important thing is that all evolution equations that we know of are time-reversible. I've heard this before, but it's so surprising to me, when one of the simplest mathematical operations - addition - is not reversible. e.g. if a+b=4 , you can't infer the values of a and b (beyond their linear relationship). This non-injectivity is a kind of summarising, with less information, where more than one state maps to…
Ha! I had not looked at it that way before.
Insofar as addition is an abstract representation of merging two collections, we are abstracting away the information that links each element of the resulting collection to the one it came from.